你不希望他们坐在那里，呆呆地看着你绞尽脑汁地活跃课堂气氛。

You don't want them to sit gawking while you struggle to keep a lesson alive.

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“他一直很快乐，很活跃，很开朗，”看着铁男在丈夫的脸上玩贴标签，安说，“他一直在不停地唱歌，以前他是不唱的。”

"He has been very happy, very active and cheerful," Anh said as she watched Nhan place stickers on her husband's face. "he's been singing a lot of songs, and he didn't sing before."

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