1. 欢迎来到三分球世界！/ Welcome to the World of 3-Pointers!
你有没有过站在篮球场最远的地方，奋力把球扔出去，看着球在空中划出一道高高的弧线，最后“唰”的一声空心入网的经历？如果那个地方刚好是三分线外面，那你可太幸运了——你刚为你的队伍拿了整整3分！👏（If you've ever stood at the farthest end of the basketball court, threw the ball with all your might, watched it draw a high arc in the air, and finally swish through the net? If that spot was outside the 3-point line, you're so lucky—you just scored 3 whole points for your team! 👏）
不过，你是不是也好奇过：为啥线外面的球就得3分，线里面的就只有2分？这条画在场地上、弯弯曲曲的三分线，到底是谁发明的？为什么现在连幼儿园大班的小朋友打球，都非要站在三分线外面投，哪怕投不进也不愿意走到线里面投两分？别着急，这一章我们就来把三分球的所有小秘密都扒个明白，保证你看完以后，再看NBA比赛的时候，不仅能看懂每个三分球的价值，还能成为小伙伴里最懂三分球的“小专家”！（Don't you ever wonder: why do shots from outside the line get 3 points, while shots from inside only get 2? Who invented that wiggly 3-point line drawn on the court? Why do even kids in senior kindergarten insist on shooting from outside the 3-point line when playing basketball, even if they miss, instead of walking inside to take a 2-point shot? Don't worry, in this chapter we'll uncover all the little secrets of 3-pointers. After reading, you'll not only understand the value of every 3-pointer when watching NBA games, but also become the "little expert" on 3-pointers among your friends!）
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一、三分线是从哪来的？（Where Did the 3-Point Line Come From?）
1.1 40多年前的NBA，根本没有三分线！
你们是不是觉得篮球场上一直都有这条弯弯曲曲的线呀？其实呀，在1979年之前，NBA比赛里根本没有三分线！那时候的球员们投篮，只有两种得分方式：站在线里面投进得2分，被犯规了