同义词： gear gear wheel geared wheel cogwheel
以上来源于: WordNet
The two cog wheels engaged and the machine started.
那两个齿轮一啮合，机器就启动了。
youdao
The two cog-wheels engaged and the machine started.
Lord Wimborne had a positive duty to protect the boy from the cog-wheels by ensuring there was a safety guard or fence.
BBC: UK
When a boy lost an arm in the cog-wheels of a steam winch owned by Lord Wimborne, the courts ruled in a landmark judgment in 1898 that the factory boss had breached an absolute duty imposed on him by statute.
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