压紧

yā jǐn yī kuài hǎi mián

压紧一块海绵

compress a sponge

tā men zhèng zài yòng yī tái bèn zhòng de jī qì yā jǐn xīn bǔ xiū de lù miàn

他们正在用一台笨重的机器压紧新补修的路面。

They are using a heavy machine to ram down the surface of the newly mended road.

yā jǐn yī céng xuě

压紧一层雪

a layer of compacted snow