For both systems a cloud or train of bubbles may coalesce to give larger bubbles .

对这两个系统来说，一群或一串气泡都可以合并成较大的气泡。

youdao

For both systems a cloud or train of bubbles may coalesce to give larger bubbles .

对这两个系统来说，一群或一串气泡都可以合并成较大的气泡。

youdao