hang by a thread 岌岌可危
hang by a hair's breadth 毫发之差
escape by a hair's breadth 侥幸逃脱
close call 千钧一发
narrow escape 死里逃生
1. The car hung by a hair, missing the truck by just an inch.
那辆车千钧一发地躲过了卡车，只差了一英寸。
2. The project succeeded by hanging by a hair; we almost missed the deadline.
项目侥幸成功了，我们差点错过了截止日期。
3. He was hanging by a hair when his plane was cancelled last minute.
当他的航班在最后时刻被取消时，他真是岌岌可危，险些赶不上会议。
A: Did you make it to the interview on time?
A：你按时赶到面试了吗？
B: Barely. My car broke down on the highway, so I was hanging by a hair.
B：勉强赶上了。我的车在高速上坏了，我当时真是命悬一线，差点迟到。
1) 指情况极其危险或困难，仅靠极小的优势或运气避免失败。
2) 形容某事在最后关头才达成或解决。
3) 常用于描述交通事故、截止日期、比赛结果等惊险时刻。
1. 岌岌可危；千钧一发；侥幸成功或逃脱
e.g.We escaped the accident by hanging by a hair.
我们侥幸逃过了那场事故，真是千钧一发。
idiom
1. In a very dangerous or difficult situation; barely avoiding failure or disaster.
Synonym: hang by a thread, close call, narrow escape