There were no witnesses when the murder happened.

谋杀案发生时没有目击证人。

youdao

The police began to look into the case of murder as soon as it happened.

凶杀案一发生警方就开始调查此案。

youdao

The police began to look into the case of murder as soon as it happened.

凶杀案一发生警方就开始调查此案。

youdao