讲解文本：

have a lot on one's mind 有事在心上，有很多烦心事
You look like you have a lot on your mind.
你看起来有很多心事啊。
I know you have a lot on your mind, but we still have work to do.
我知道你有很多烦心事，但我们还有许多工作要做。

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