spare/speər $ sper/

a. not being used or not needed at the present time

a. 备用的；空闲的，多余的：a spare key/room/tyre 备用钥匙/房间/轮胎

◇What do you do in your spare time? 你闲暇时做些什么？

音组-pare/-eər $ -er/

compare; prepare; spare