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为何铅笔是完美的
1,606,737 plays
|
Caroline Weaver
|
Small Thing Big Idea
• March 2018
Read transcript
为什么铅笔的形状都是六边形的，并带有标志性的黄色？铅笔店的主人卡洛琳•韦弗将带我们进入铅笔迷人的发展史之中。
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