名词
中文翻译：Unknown
同义词：
['pusher', 'propellor', 'impeller']
例句：
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1. The jactitator is responsible for pushing the boat forward.
推动者负责推动船前进。
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2. The jactitator is responsible for propelling the ship through the water.
推动者负责将船驶出水面。
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3.The jactitator is responsible for turning the screws in the machine.
推动者负责转动机器中的螺丝。