in a cage的用法和樣例：
例句
- He put the dog in a cage and the animal ran round and round in it all day.
他把狗關在籠子里，狗呆在裡面整天轉來轉去。 - The bird is pent up in a cage.
這隻鳥被關在籠子里。 - He walked up and down the room between his books like a wild animal in a cage.
他在屋裡的書堆中來回踱步，猶如籠中困獸。 - Is it cruel to confine a bird in a cage?
把鳥關在籠子里殘忍不殘忍?
