When it thunders why do we see the lighting first, then hear the thunder?

为什么在打雷时，我们总是先看到闪电后听到雷声？

youdao

Q: When it thunders why do we see the lighting first, then hear the thunder?

问：为什么在打雷时，我们总是先看到闪电后听到雷声？

youdao

The question was: When it thunders why do we see the lighting first, then hear the thunder rolls?

这个问题是：为什么在打雷时，我们总是先看到闪电后听到雷声？

youdao

A crash of thunder sounded as a bolt of lighting struck the ground close to the basket where the rain babies slept.

VOA: special.2009.02.28