on the ball
汉语翻译
机警的, 勤奋的, 高明的
例句
- The new clerk is really on the ball. He's already improved the filling system in the office.新来的办事员真能干，他已经改进了办公室文件归档的方法。
- If you don't get on the ball and start studying harder, you're going to flunk.如果你不积极进取，更加努力学习，你就会考不及格的。
- The new publicity manager is really on the ball.新的宣传部主任确实很内行。
- The great value of Jack as a committee man is that he is always on the ball.作为一名委员，杰克的巨大作用是始终保持警惕。
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