为什么在打雷时,我们总是先看到闪电后听到雷声?
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?
Q: When it thunders why do we see the lighting first, then hear the thunder?
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?
The question was: When it thunders , why do we see the lighting first, then hear the thunderrolls?
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