while I was doing my homework ,I heard a Strong noise (同义句转换)

问题描述:

while I was doing my homework ,I heard a Strong noise (同义句转换)

When I heard a Strong noise ,I was doing my homework .
或 I was doing my homework when I heard a Strong noise
注意 以上两句 意思 并不完全一样 前者是复合句 后者是并列句