a flat tire

基本解释

Stop to help. The next time you see someone pulled over with a flat tire, or in need of assistance, stop and ask how you can help.
停下来去帮助别人。下次当你看到某人爆胎了停在路边或者需要帮助，停下来问问有什么可以做的。
lailook.net
No giant sucking sound, just the gentle hissing of an inner tube losing air, threatening a flat tire that could send the American dream machine off the road.
即便听不到较大的泄气声，只是嘶嘶地缓慢漏气，也会使名为“美国梦”的这台汽车的轮胎瘪掉，而偏离了正确的道路。
It learns over time that if you retread a flat tire over and over again, and it keeps going flat on you, perhaps it is time to buy a new tire - if you hope to actually move forward.
随着时间的推移，它学习到如果你一次又一次地翻新一个漏气的轮胎，它会继续泄气，如果你希望真的可以向前走的话，可能是时候买一个新轮胎了。

If you're driving on the highway and you see somebody with a flat tire,
如果你正开车行驶在高速公路上，你发现有一辆车爆胎了，
I can 课堂 - SpeakingMax英语口语达人

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