Ungeared
无齿轮啮合的
🗣️ 情景例句
When's the next class?
下一次上课什么时候？
To ensure faster delivery, you are asked to forward the order by air freight.
为了确保迅速交货，我方要求此订货用空运。
I hope we can see each other again some time.
希望还能有相见的机会。