flat tire什么意思解释？

flat tire的音标：flat tire的英式发音音标为：[flæt 'taiə]flat tire的美式发音音标为：[flæt taɪr]...

I unluckily had a flat tire on the way here.到这儿来的路上,不幸我的车胎泄气了.A flat tire put my bicycle out of commision.车胎跑气使我的自行车无法使用.Todd changed her flat tire quickly.陶德很快便将她的破轮胎换好....