你必须集中精力，一刻都不能松懈。

You cannot afford to relax your concentration for a moment.

《牛津词典》

你必须集中精力注意听我说的话。

You must give me your close attention.

youdao

你必须集中精力赢下自己的比赛。

You get into game mode and focus on winning.

youdao

你必须集中精力完成你正在做的。

You must focus on the completion of what you are doing.

youdao

你必须集中精力，您可以提供。

You have to concentrate on, you can provide.

youdao

如果你有致富的愿望，你必须集中精力。

If you have any desire of being rich, you must focus.

youdao

你必须停止分心，集中精力在你手头的工作上。

You must reject distraction and concentrate on your work at hand.

youdao

无论你经营的是何类企业，你都必须集中精力于明确、主要的目标上。

Whatever your enterprise, concentration on your definite major purpose is essential.

youdao

无论你经营的是何类企业，你都必须集中精力于明确、主要的目标上。

Whatever your enterprise, concentration on your definite major purpose is essential.

youdao