keep back

Keep some blood plasma back for the serious cases.

留一些血浆给重病号。

She was unable to keep back her tears, and wept freely.

她抑制不住泪水, 痛痛快快地哭了起来。

We must keep back a reserve of food.

我们必须贮存一些食品。

I asked the spectators to keep back from the sideline.

我求观众们不走近边线。

Do not keep yapp back at me when you do not really know the entire picture.

你不知道整个真实情况，别对我哇啦哇啦叫不停。

The stockholders agreed to let their company keep back a part of its profits for reserve funds.

股东们同意让公司扣留一部分利润作为公积金。