意思：
n. 圆筒；汽缸；[数] 柱面；圆柱状物The diver jumped into the sea with an oxygen cylinder on his back.
潜水员背上氧气瓶跳进了海里。
There is a water jacket outside the engine cylinder.
发动机汽缸外面是一个水套。
The teacher asked Tom to calculate the volume of the cylinder.
老师让汤姆计算这个圆柱体的体积。
Deep-sea swimmers carry cylinders of oxygen on their backs.
深海游泳员背着氧气圆筒。
The cylinder is cooled by a jet of water.
气缸可用喷水冷却。
The car was powered by a four cylinder air-cooled engine.
这辆汽车是由一个四缸气冷式发动机驱动的。
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