名词
中文翻译：变速箱齿轮
同义词：
['countershaft', 'gearbox例句：1. The new engine has a countershaft gear that makes it more efficient.（新引擎有一个高效的变速箱齿轮。）']
例句：
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1. The new engine has a countershaft gear that makes it more efficient.
新引擎有一个高效的变速箱齿轮。
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2. The car's transmission is made up of several countershaft gears.
汽车的传动装置由几个变速箱齿轮组成。
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3. The engineer replaced the worn-out countershaft gear with a new one.
工程师用一个新的变速箱齿轮替换了磨损的部件。