In one charming early experiment, children were given felt-tipped pens to play with, an activity that most enjoyed.
以前有一个有趣的实验，研究者发给孩子们彩色的软头笔玩，那是一项孩子们最喜欢的活动。
In one charming early experiment, children were given felt-tipped pens to play with, an activity that most enjoyed.
以前有一个有趣的实验，研究者发给孩子们彩色的软头笔玩，那是一项孩子们最喜欢的活动。
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