Some health experts say it is possible that doubling up the masks could help in some situations.

一些卫生专家表示，在某些情况下，戴两只口罩可能会有所帮助。

They're doubling up on things or going off at tangents-some sort of group training should sort it out.

要么加倍投资，要么就是没有实质性的进展——团队训练应该能解决这个问题。

He jumps with an insane frenzy, doubling up his body in an effort to sink his jaws to the bone.

他发疯般地跳了起来，将身体翻了两下，努力让下巴咬到骨头上。

In those, such as English, which do, the doubling up of signals may have developed to make them easier to learn.

在那些， 例如英语中，信号的加倍可能已经发展到使它们更容易学习。

" If your mother only knew, " he told her, doubling up with laughter, as he always said whenhe told her something in confidence.

“要是你妈妈知道就好了， ” 他对她说，笑得合不拢嘴，当他向她私下告诉她一些事情时， 他总是这样说。

The octopus genome is much bigger than that of its cousins like oysters or clams. It had been thought that this was because of a duplication in the past, essentially doubling up their entire genome.

章鱼的基因组比牡蛎或蛤蜊等它的表亲大得多。人们认为这是因为过去的重复，基本上是将他们的整个基因组加倍。