wheelchair是什么意思？

　　例句：

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

　　他将在轮椅上度过他的余生。

　　An electric wheelchair has given her greater mobility.

　　电动轮椅使她更便于移动了。

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

　　他从车祸以后就离不开轮椅了。