Cách sử dụng
The expression "hang by a hair/thread" refers to a situation where something is in great danger of falling or failing. It can be used to describe a physical object that is barely hanging on, or a person's situation that is precarious or risky. For example, if someone's job is on the line and they're almost losing it, you could say that they are "hanging by a hair/thread". Alternatively, if a picture frame is barely attached to the wall, it could also be described as "hanging by a hair/thread".