You use mobile to describe something large that can be moved easily from place to place.
the four-hundred seat mobile theatre.
拥有400个座位的流动剧场。
If you are mobile, you can move or travel easily from place to place, for example because you are not physically disabled or because you have your own transport.
I'm still very mobile.
我仍然行动自如。
In a mobile society, people move easily from one job, home, or social class to another.
We are a very mobile society and can't resist trying to take everything with us.
我们的社会流动性很强,所以忍不住想把一切都随身携带。
mobiles
A mobile is a decoration that you hang from a ceiling. It usually consists of several small objects which move as the air around them moves.
A mobile is the same as a mobile phone.