They burst into laughter.

他们突然放声大笑。

youdao

They burst into laughter.

他们突然大笑起来。

youdao

When they burst into laughter, she blushed. (start suddenly).

他们突然大笑起来，她脸涨得通红。

youdao

They all burst into laughter.

他们都大笑起来。

youdao

They both burst into laughter .

他们两人都大笑起来。

youdao

They both burst into laughter .

他们两人都大笑起来。

youdao