burst out

闯出, 突然 ... 起来, 大声叫喊, 突然发生

例句与用法：

Scarcely had she heard the sad story when she burst out crying.

她一听到这悲伤的消息，就失声痛哭。

She burst out laughing and then checked herself.

她突然爆笑起来，然後又突然止住。

He burst out crying like a child.

他像孩子一样忽然哭起来。

Burst out laughing; burst into tears.

突然大笑起来; 突然哭起来

She burst out laughing.

接着她忽然笑起来。

详细释义：

突然……起来

They burst out laughing.

他们突然大笑起来。