名词
中文翻译：Unknown
同义词：
['transmitter', 'translator', 'gear shifter']
例句：
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1.The car's engine is a powerful shifter that can easily change gears.
这辆车的发动机是一个强大的换挡装置，可以轻松地换挡。
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2. The engineer used a shifter to manually control the speed of the conveyor belt.
工程师使用一个换挡装置来手动控制输送带的速度。
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3. The shifter was designed to make it easy for people with disabilities to operate machinery.
这个换挡装置的设计使得残疾人更容易操作机械。