That partial vacuum means that air has to flow upwards to keep that wing afloat.

那部分真空意味着空气必须向上流动以保持翅膀漂浮在空中。

Air flows over the tear and under the tear, creating a partial vacuum on top of the wing.

空气流过裂缝上面和下面在翅膀顶部产生部分真空。

The lower temperature also lowers the pressure, creating a partial vacuum that makes the piston move back into its original position.

最低温度降低压力，创造 部分真空使活塞返回其位置。

But this test wasn’t a perfect one, because open air testing can’t replicate the partial vacuum you’d find in a real hyperloop tube.

但是这个测试并不完美，因为露天测试无法复制您在真正的超级高铁管中发现的部分真空。

And that’s because we all have complete cheeks, which means we have muscles and tissues that let us seal our mouths and create a partial vacuum.

那是因为我们都有完整的脸颊，这意味着我们有肌肉和组织可以让我们闭上嘴巴并产生局部真空。

It keeps bobbing back and forth for a while, and as the water evaporates, it cools the vapor in the bird's head, which condenses into liquid, creating a partial vacuum in the head.

它继续上下一段时间，当 水蒸发，冷却蒸汽。