under-one-s-hat

under-one-s-hat什么意思,under-one-s-hat翻译

例句

• keep something under one"s hat ? We should by no means neglect the evaporation of water.

  我们绝不能忽视水的蒸发作用。

• keep something under one"s hat

  隐瞒某事；保守秘密