1、What you're looking for is the electromagnet. which turns the first gear in the gear train.
你要找的是電磁體（螺線管），在傳動機(jī)構(gòu)中驅(qū)動第一齒輪。

2、use first gear on steep hills.
用第一檔爬上陡峭的小山。

3、First gear concentration is acuteness.
一檔集中劇烈。

4、We finally stopped dropping into first gear at all on the pavement which.
我們終于停止落入第一檔在所有的路面其中。

5、If you need the clock's hands, reinstall the first gear out. and reverse your disassembly.
如果你需要時鐘的指針，就將第一個齒輪裝回去，逆序重復(fù)拆卸動作。