be on the ball

美 　英

• na.精力奮發(fā)地干
• 網(wǎng)絡留心；在精力充沛地行動；知情

英漢解釋

na.	1. 精力奮發(fā)地干,熟習內(nèi)情

例句

But I would like to try a different kind of life. I prefer to be on the ball.

但是我想嘗試另外一種生活，一種忙碌的生活。

A traffic police officer has to be on the ball and resolve problems quickly.

交通警察必須很有警覺性，能很快地解決問題。

As a politician, you must be on the ball in the election.

你是一名政治家，必須在選舉中時刻警惕。

Mr. J hopes that what he has been writing will be on the ball.

先生希望他所寫的文章都很出色。

If you want to finish this on time, you must be on the ball

如果你想及時完成這工作，就得干勁十足。