### Chinese: 众所周知，在事故发生后救护车来的过程中其实是还有一段时间的，而正是这段时间才是最关键的。
### English: As everyone knows, there is certain period before the coming of the ambulance after <v>the happening of the accident</v>, which is the critical time for rescue.
### Errors: There is a minor style/awkward error at "the happening of the accident" within <v></v>.

### Improved English: As everyone knows, there is a period before the coming of the ambulance after the accident happens, which is most critical.
