奇遇！会说话的知识小精灵 / Meet the Talking Knowledge Sprite!

七月的蝉鸣把空气烤得发烫，学校组织的科技夏令营正躲在图书馆的阴凉里开小差。朵朵推了推滑到鼻尖的厚眼镜，攥着刚从旧书架最上层抽出来的《小王子》绘本，指尖蹭过封面上磨得起毛的烫金图案时，忽然摸到了一个硬邦邦的、还带着点凉意的东西。

“咦？这是什么？掉在书架缝隙里的小本子？”米粒蹲在她旁边，短头发上沾了点从窗缝飘进来的梧桐絮，凑过来一看，眼睛瞬间亮了。那是个巴掌大的深蓝色皮面本子，封面上印着细细的金色纹路，像夜空中连成网的星星，摸上去软乎乎的，像刚晒过太阳的小猫肉垫。

朵朵刚想翻开，米粒指尖的汗刚碰到封面，整本子忽然亮起暖融融的淡金色光，光里飘出来个毛茸茸的小东西，“啪嗒”掉在摊开的书页上，还打了个滚。那是个浅绿色的小精灵，头发像刚冒出来的三叶草嫩芽，尖尖的耳朵抖了抖，卷成问号的尾巴翘得老高，半透明的翅膀扇了扇，带过来点晒过太阳的青草香。

“你们好呀！我是知识小精灵知知，等你们好久啦！/ Hello! I'm Knowledge Sprite Zhizhi, I've been waiting for you for a long time!”

朵朵和米粒吓得往后一缩，米粒踩到了掉在地上的四叶草，结结巴巴地问：“你、你怎么从本子里出来的？这该不会是图书馆的镇馆之宝吧？我可不能碰坏它！”

知知哈哈笑了，声音脆得像咬了一口刚摘的脆苹果：“别怕别怕，这个本子不是普通的书哦，它是<knowledge_graph>知识图谱</knowledge_graph>，是专门帮爱问问题的小朋友解答疑问的魔法本子！/ Don't be afraid, this book is not an ordinary book, it's a <knowledge_graph>knowledge graph</knowledge_graph>, a magic book specially to answer questions for kids who love asking questions!”

朵朵的眼睛瞬间亮了——她上周科学课刚问了老师“为什么天空是蓝色的”，昨天还在和米粒讨论“为什么猫咪那么喜欢钻纸箱”，她往前凑了凑，眼镜片都映着本子上的金光：“知识图谱？是比百科全书还厉害的书吗？”

“比百科全书还厉害哦！”知知跳到本子封面上，尾巴点了点亮晶晶的封面，“普通的百科全书里的知识，就像一颗一颗散在地上的小珍珠，你要找哪一颗，就得翻好多页，找好久。但是知识图谱呢，会把所有的小珍珠都用线串起来，变成一张大大的魔法网，你想找什么知识，一找就能找到，还能知道这个知识和别的知识有什么关系呢！/ It's even more powerful than an encyclopedia! The knowledge in ordinary encyclopedias is like little pearls scattered on the ground, if you want to find one, you have to flip through many pages and take a long time. But the knowledge graph will connect all the little pearls with lines to make a big magic net, if you want to find any knowledge, you can find it at once, and you can also know what relationship this knowledge has with other knowledge!”

米粒歪头琢磨了一下，举手问：“那它怎么

“那它怎么把知识串成网的呀？”米粒晃了晃扎羊角辫的头发，指尖还捏着刚才踩到的四叶草叶柄，眼睛瞪得圆溜溜的，像两颗浸了水的黑葡萄。窗外的梧桐树影斜斜铺在旧书架的橡木板上，知知浅绿色的小翅膀扇了扇，沾在绒毛上的蒲公英絮飘起来，落在摊开的《小王子》书页上，瞬间变成了小小的金色星星。

“特别简单哦！知识图谱的魔法只需要两个小助手，就能把所有零散的知识都串起来啦！这两个小助手呀，一个叫<entity>实体</entity>，一个叫<relation>关系</relation>，它们可是知识图谱里最勤劳的小蜜蜂呢！/ It's super simple! The magic of knowledge graph only needs two little assistants to connect all the scattered knowledge! These two little assistants are called <entity>entity</entity> and <relation>relation</relation>, they are the busiest little bees in the knowledge graph!”

朵朵推了推滑到鼻尖的厚眼镜，镜片上还沾了点上午科学课留下的粉笔灰，小声问：“实体和关系？是像我们数学课上的‘数字’和‘加减法’吗？”

“对了一半哦！”知知“啪”地打了个响指，卷成问号的尾巴翘得更高了，“实体呀，就是所有你能想得到、看得见、摸得着的‘具体的东西’，不管是真实存在的，还是你脑子里想到的，都可以是实体哦！比如——”她飞到《小王子》的插画页上，小爪子点了点戴围巾的小王子，“你看，这个小王子是<实体>，他住的B612星球是<实体>，他养的玫瑰花是<实体>，甚至他上次被大人批评后心里的‘委屈’，也是<实体>哦！小朋友脑子里的所有想法、感受，都可以是知识图谱里的实体呀！/ That's half right! An entity is all the 'specific things' you can think of, see, or touch, whether they really exist or just in your mind, they can all be entities! For example——” she flies to the illustration page of "The Little Prince" and points to the little prince wearing a scarf, "You see, this little prince is an entity, the B612 planet he lives on is an entity, the rose he raises is an entity, even the 'grievance' in his heart after being criticized by adults last time is also an entity! All the thoughts and feelings in children's minds can be entities in the knowledge graph!”

米粒“嗷”地蹦了起来，羊角辫上的粉色蝴蝶结晃来晃去：“我知道我知道！我家的橘猫年糕是实体！我上周吃的草莓冰淇淋是实体！我画画的24色水彩笔是实体！还有我们夏令营的图书馆、图书馆门口的流浪三花猫、我昨天没做完的暑假作业，都是实体！”

“答对啦！你举的例子比我还多呢！/ That's right! You gave more examples than me!” 知知从翅膀上摘下一片小小的梧桐絮，飘到米粒手心里，“那关系是什么呢？关系呀，就是这些实体之间发生的小故事，是连接两个实体的 invisible 小线哦！比如——”她点了点摊开的深蓝色本子，页面上立刻浮起一层淡金色的光，光里跳出好几个亮晶晶的小卡片：

```mermaid graph LR A[年糕<br/>(实体)] --> B[是<br/>(关系)] B --> C[橘猫<br/>(实体)] A --> D[喜欢<br/>(关系)] D --> E[小鱼干<br/>(实体)] A --> F[住在<br/>(关系)] F --> G[朵朵家<br/>(实体)] A --> H[上周碰掉<br/>(关系)] H --> I[米粒的橡皮<br/>(实体)] style A fill:#ffcc99,stroke:#ff9900,stroke-width:2px style C fill:#ffcc99,stroke:#ff9900,stroke-width:2px style E fill:#ffcc99,stroke:#ff9900,stroke-width:2px style G fill:#ffcc99,stroke:#ff9900,stroke-width:2px style I fill:#ffcc99,stroke:#ff9900,stroke-width:2px style B fill:#99ccff,stroke:#3366cc,stroke-width:1px style D fill:#99ccff,stroke:#3366cc,stroke-width:1px style F fill:#99ccff,stroke:#3366cc,stroke-width:1px style H fill:#99ccff,stroke:#3366cc,stroke-width:1px ```

“你看，年糕这个实体，通过‘是’‘喜欢’‘住在’‘碰掉’这些关系，和橘猫、小鱼干、朵朵家、橡皮这些实体都连起来了，是不是就像一张小小的网？这些连接实体的‘小故事’，就是<关系>哦！关系可以是‘是什么’‘喜欢什么’‘住在哪里’，也可以是‘碰掉了什么’‘比什么高’‘和谁是朋友’，只要是两个实体之间的关联，都可以是关系呀！/ You see, the entity Niangao is connected to other entities like orange cat, dried fish, Duoduo's home, and eraser through relations like 'is', 'likes', 'lives in', 'knocked over', isn't that just like a small net? These 'little stories' that connect entities are <relations>! Relations can be 'what is', 'what likes', 'where lives', or 'knocked over what', 'taller than what', 'who is friend with', as long as it's the connection between two entities, it can be a relation!”

【纸书排版提示：此处插入配图1，为“年糕知识图谱小网”的卡通插画，实体用暖橙色卡片标注，关系用浅蓝色线条标注，和上方Mermaid图对应】 【电子版提示：点击配图可放大查看知识图谱的每个节点，点击节点还能看到更多相关知识哦！】

米粒凑过去摸了摸屏幕上的“小鱼干”卡片，嘴都合不拢了：“这也太好玩了吧！原来年糕和小鱼干之间还有这样的关系呀！我之前只知道年糕爱吃小鱼干，从来没想过它们还能连成一张网！”

“现在我们来玩个刚才说的小游戏好不好？/ Let's play the little game we just mentioned, okay?” 知知把本子翻到空白页，页面上立刻跳出来一大堆半透明的卡片，有的写着“年糕”“橘猫”“草莓冰淇淋”“米粒”“图书馆”，有的写着“是”“喜欢”“住在”“比……高”“上周吃了”，还有几张空白的卡片，“我们把所有卡片分成两类，一类是‘东西’也就是实体，一类是‘东西之间的故事’也就是关系，看看你们能不能在5分钟内分完哦！/ We divide all the cards into two categories, one is 'things' which are entities, the other is 'stories between things' which are relations, let's see if you can finish dividing them in 5 minutes!”

【纸书排版提示：此处插入配图2，为“给猫咪贴标签”小游戏的贴纸页，印刷出所有上述卡片，小朋友可以用附赠的贴纸完成分类】 【电子版互动入口：👉 点击此处开始「实体配对」小游戏，完成游戏可获得“知识小能手”电子徽章哦！】

朵朵先把写着“年糕”“橘猫”“草莓冰淇淋”“米粒”“图书馆”“三花猫”的卡片放在一起，声音很稳：“这些都是实体，都是具体的东西。”米粒则把剩下的“是”“喜欢”“住在”“比……高”“上周吃了”推到另一边，还举手补充：“‘比……高’也是关系！比如米粒比朵朵矮，米粒和朵朵之间就有‘比……矮’的关系，也是关系的一种！”

“太棒啦！你们俩都是分类小能手！/ That's great! You two are both good at classifying!” 知知拍着小手，翅膀上的光闪得整个书架都在发亮，“你看，实体和关系两个小助手一配合，就能把原来散在各处的知识都串成小线，好多小线凑在一起，就是一张大大的知识网啦！这就是<knowledge_graph>知识图谱</knowledge_graph>的魔法哦！原来你以为零散的知识——比如‘猫喜欢钻纸箱’‘猫是夜行动物’‘猫的爪子有肉垫’，其实都可以通过‘猫’这个实体串起来，还能和‘年糕上次钻纸箱碰掉巧克力’‘米粒被猫爪勾过毛衣’这些你平时注意不到的小知识连在一起，是不是特别神奇？/ You see, as long as the two assistants, entity and relation, work together, they can connect the scattered knowledge from all over the place into small lines, and many small lines together make a big knowledge net! This is the magic of <knowledge_graph>knowledge graph</knowledge_graph>! The knowledge you thought was scattered before——like 'cats like to drill into cardboard boxes', 'cats are nocturnal', 'cats have pads on their claws'——can actually be connected through the entity 'cat', and even connected with those little bits of knowledge you usually don't notice, like 'Niangao knocked over the chocolate when drilling into the cardboard box last time', 'Millet's sweater was hooked by a cat's claw', isn't it amazing?”

朵朵的眼睛亮了，她上周刚好看了科普书里讲猫的夜视能力，一直想不通为什么猫晚上能看得清，赶紧问：“那如果我想知道‘为什么猫晚上能看得清’，知识图谱也能帮我找到答案吗？”

“当然可以呀！/ Of course!” 知知飞到本子封面上，尾巴点了点上面连成网的金色星星纹路，本子上立刻浮现出一张更大的金色知识网：最左边的节点是“猫”，连出来三条线，第一条连到“猫的视网膜有视杆细胞”，第二条连到“视杆细胞能感知弱光”，第三条连到“晚上光线弱”，三条线汇聚到最右边的结论节点“猫晚上能看得清”，旁边还跳出来个小补充：“年糕上周晚上在客厅抓蚊子，一点亮灯就撞到了沙发，哈哈！/ Of course!” Zhizhi flies to the cover of the book, and points to the golden star pattern connected into a net on it with her tail, and a larger golden knowledge net immediately appears on the book: the node on the far left is "cat", three lines extend from it, the first line connects to "cat's retina has rod cells", the second line connects to "rod cells can perceive weak light", the third line connects to "weak light at night", the three lines converge to the conclusion node on the far right "cats can see clearly at night", and a small supplement pops up next to it: "Niangao caught a mosquito in the living room last week, and bumped into the sofa as soon as the light was turned on, ha ha!”

“你看，要是没有知识图谱，你要找这个问题的答案，可能得翻三四本科普书，找半小时都找不到。但是有了知识图谱，它把所有相关的知识都连在一起了，你一输入问题，答案和相关的小知识一下子就跳出来啦！而且你还能顺着网找更多好玩的知识，比如‘视杆细胞还能感知什么颜色’‘猫的夜视能力有多强’，顺着线一找就能找到，不用再一本一本地翻书啦！/ You see, if there is no knowledge graph, if you want to find the answer to this question, you may have to flip through three or four popular science books and can't find it even after half an hour. But with t