These films can be used to make a new type of loudspeaker that works by heating and cooling the air, rather than bouncing up and down to vibrate the air directly.

这样制成的薄膜可以被用来制造一种新型扩音器，这种扩音器通过加热和冷却空气工作，而不再是直接通过往复运动使空气产生振动效果。

youdao

It works by drawing air through filters to remove dust and particles, then cooling it to just below the temperature at which dew forms.

该产品的原理是：通过过滤器抽取空气，除掉其中的灰尘和小颗粒，接着将空气冷却至水的凝点。

youdao

The main part of the cooling system is a 3-wheel air-cycle machine which works as a self-controlled system for heating and cooling.

冷却系统的主要部件是一部3轮空气循环机，是可以进行加热和制冷工作的自维持系统。

youdao

This is similar to the way a power station's cooling tower works.

ECONOMIST: Combating climate change

To confirm that the device works by cooling the body, Dr Grahn himself volunteered to be the next test subject.

ECONOMIST: Athletics: Cool, man | The

These include central station alarms to alert police when a break-in is occurring, a plan to remove valuables to a nearby fine-art storage facility or a specially constructed safe room in one's home during a hurricane or tornado, and climate controls that ensure levels of heat, cooling and humidity appropriate to works of art.

WSJ: Hurricane Sandy May Lead More Art Collectors to Seek Additional Insurance Coverage