When water is pumped out of a chamber below the plate creating negative pressure, the stretchable sensors are pulled down, producing a concave shape.

当水从板下的一个腔中被抽出来产生负压时，可伸缩的传感器被向下拉，形成一个凹形。

youdao

The detection systemcould not press or squeeze the egg like the graders did, but what would happenif they could pull on the egg with a slight negative pressure, or vacuum?

检测系统不能像分级员一样按压或挤压鸡蛋。 然而，如果它们能够用极小的负压或真空把鸡蛋牵引起来，结果会怎样呢？

youdao

Theeggs were then subjected to the negative pressure/imaging system and regraded.

这些鸡蛋然后经过负压/成像系统处理，重新评定。

youdao

As an example,he says Soviet war veterans exert political pressure against negative portrayals of events they participated in and that the Kremlin has its own interest in creating the historical truth commission.

VOA: standard.2009.12.25

So if delta v is negative, in this case delta v is negative, OK, delta v is negative, pressure is a positive number, negative times negative is positive, work is greater than zero.

也就是当活塞,压缩气体的时候，做的功是正的，按照这一规定,我们需要在这里，加上一个负号，这是习惯规定。

麻省理工公开课 - 热力学与动力学课程节选

Negative pressure doesn't make any sense, right?

负的压强没有意义？

麻省理工公开课 - 热力学与动力学课程节选

In other words the iron lung is sealed and attached to bellows, which lower the air pressure inside the iron lung to create a negative pressure.

CNN: 'I lived in an iron lung for seven years'

When the negative pressure is released, the chest wall "collapses" and one breathes out.

CNN: 'I lived in an iron lung for seven years'

One of the great innovations in recent years has been negative pressure wound therapy.

BBC: US Army seeks new ways to treat facial skin injuries