The effect clouds have on climate has been something of a mystery to atmospheric scientists, with some researchers hoping they would provide a silver lining by acting as a brake on climate change.

对大气科学家来说，云层对气候的影响一直有点像是个谜，一些研究人员希望云层能够成为遏制气候变化的卫士，从而给我们带来一线希望。

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The spring brake air chamber of motor vehicle, acting as the power installation of brake actuating system, improves the efficacy and simplifies the construction of parking brake system.

汽车储能弹簧制动气室做为驻车制动系统的动力装置，提高了驻车制动效能，简化了驻车制动系统结构。

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In order to strengthen the brake action, a spring-acting friction-brake is designed.

为了加强制动作用，设计了一种加装反馈弹簧的织机制动机构。

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They will be with us for years to come, powerful headwinds acting as a brake on recovery.

BBC: How pretty is the UK without the "bad bits"?

Far from being the force for change envisioned by Samuel Huntington and other advocates of modernization theory, the middle class in many young democracies is now actually acting as a brake on change.

FORBES: Emerging World's Middle Class: Crying, 'Stop!'

Uncertainy over the direction of the economy is acting as something of a brake on the U.S. manufacturing at a time when global rivals are less constrained.

FORBES: Uncertainty Weighs On Manufacturing Jobs