Because they lost power to the water cooling system, they needed to vent the pressure that's building up inside.

因为水冷系统失去了动力，内部聚集的压力需要排出。

youdao

Then he ran and hid in a vent at the side of the building.

接着他跑到大楼旁边的一个通风口藏了起来。

youdao

My eyes would always be drawn to the 2 x 2 foot air vent on the wall where it met the ceiling and went on through the labyrinth of the building.

我不由自主会注意到墙上那个紧挨着房顶的2 信×2英尺大的气孔，那气孔通向这个如迷宫般的建筑的各个地方。

youdao

Thieves entered the building, just a few blocks from the U.S. capitol, through a vent on the roof.

CNN: Thieves break into office of Israeli candidate's pollster