The engine drove the rear wheel via a belt.

发动机通过一条传动带拖动后轮。

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The water pump is a simple centrifugal pump driven by a belt connected to the crankshaft of the engine. the pump circulates fluid whenever the engine is running.

水泵就是一个简单的离心泵，用皮带连接发动机上的曲轴。发动机无论何时运转水泵都能循环起来。

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Most people know electricity standing still is no more useful than is a stationary belt between a steam engine and a machine to be driven.

大多数人认为，停滞不动的电并不比架设在蒸汽机和要被传动的机器之间的固定带更有用。

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In these industries, China is not so much an engine of demand as a transmission belt for demand originating elsewhere.

ECONOMIST: China may not matter quite as much as you think

As a motorist, don't sit in a parked car studying the map: fasten your belt and fire up the engine in no more than five seconds.

ECONOMIST: Freedom, guns and women

The belt of circularity in America's economic engine, however, is broken.

CNN: Christensen: We are living the capitalist's dilemma