“自己动手做事给了我们一种强烈的成就感。”来自吉林的13岁的刘佳伟说。

"Doing things ourselves gives us a strong sense of achievement," said Liu Jiawei, 13, from Jilin.

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噢，那是刘佳，我们班长。

Oh, that's Liu Jia, our monitor.

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大家好，我是刘佳。Helen，今天咱们要学的是什么最新表达呢？

Helen: Today's new expression is' bottom line '.

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