轮胎打气泵
She blew up the flat tyre with a bicycle pump.
她用自行车打气筒给瘪了的轮胎打气。
A tyre expands when you pump air into it.
轮胎一打气就鼓起来.
I tried to pump up my back tyre.
我试图给后胎打气。
She blow up the flat tyre with a bicycle pump.
她用自行车打气筒给瘪了的轮胎打气.
A tyre expands, when you pump air into it.
打气进去,轮胎便会胀大。
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