(汽车、自行车等的)瘪胎;轮胎漏气或失去足够气压而无法正常行驶的状态。
/ˌflæt ˈtaɪər/
I got a flat tire on the way to work.
我在上班路上轮胎瘪了。
After hitting a pothole, she pulled over because the car had a flat tire and it was unsafe to keep driving.
撞到坑洞后,她把车停到路边,因为车胎瘪了,继续开车不安全。
flat 原意是“平的、扁的”,用来形容轮胎失去空气后变得“塌扁”;tire 指“轮胎”。组合起来就是“塌掉的轮胎”,在日常英语中非常常见。