愉悦口语:第309期 机智英文怎么说

讲解文本：

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on the ball 机灵，聪明能干，机智
The new clerk is really on the ball. Everyone likes him
新来的职员真能干，大家都喜欢他。
You can trust Jack. He has a lot on the ball.
你可以相信他，他很有一套。

疯狂练习吧！