1. 脫軌器，轉(zhuǎn)撤器通過在不同大小的扣鏈齒輪間移動鏈條而轉(zhuǎn)換自行車齒輪（換檔）的裝置
   A device for shifting gears on a bicycle by moving the chain between sprocket wheels of different sizes.
2. 那兩個齒輪一嚙合，機(jī)器就啟動了。
   The two cog-wheels engaged and the machine started.
3. 變速器，換檔裝置在一傳送過程中從一個齒輪變到另一個齒輪的一種機(jī)械裝置
   A mechanism for changing from one gear to another in a transmission.
4. 這齒輪位置不太正確。
   The gear is not quite true.
5. 一齒輪與另一齒輪嚙合。
   One cog-wheel engages with another.
6. 這機(jī)器的齒輪裝置很特別。
   The gearing of this machine is unusual.

齒的英語翻譯：

輪的英語翻譯：