Cách sử dụng
"The bird has flown" is an idiomatic expression that means something or someone has escaped or disappeared. It is usually used when someone is too late to catch or find something or someone they were looking for. For example, if someone is looking for a criminal or a missing person and they arrive too late to catch them, they might say, "the bird has flown." It can also be used in a broader sense to describe a missed opportunity or a situation where it is too late to act.