wheelchair是什么意思？

　　例句：

　　He will spend the rest of his life in a wheelchair.

　　他將在輪椅上度過他的余生。

　　An electric wheelchair has given her greater mobility.

　　電動輪椅使她更便于移動了。

　　He's been confined to a wheelchair since the accident.

　　他從車禍以后就離不開輪椅了。