名词
中文翻译：底部发动机
同义词：
['base engine', "undercarriage engine例句：1. The bottom engine is responsible for providing power to the vehicle's wheels.（底部发动机负责为车辆的车轮提供动力。）"]
例句：
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1. The bottom engine is responsible for providing power to the vehicle's wheels.
底部发动机负责为车辆的车轮提供动力。
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2.The bottom engine is a critical component of the aircraft's avionics system.
底部发动机是飞机航电系统的关键部件。
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3. The bottom engine was designed to be lightweight and efficient.
底部发动机被设计成轻便且高效。