1. 活动的;可轻松移动的
You use mobile to describe something large that can be moved easily from place to place.
e.g. ...special mobile units where men can have their fingerprints taken and donate a specimen of blood.
人们可以取指纹和捐献血样的特设流动点
e.g. ...the four hundred seat mobile theatre.
有400个座位的流动剧场
2. 走动方便的；行动自如的；出行方便的
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.
e.g. I'm still very mobile.
我仍然行动自如。