火山喷发是一个壮观的景象

A volcanic ___eruption is a spectacular sight.

他的演讲引发了观众情绪的突然爆发。

His speech triggered an unexpected ___eruption of emotions among the audience.

吃完海鲜后，她皮肤上突然出现了红疹。

After eating seafood, she had a sudden ___outbreak of red rashes on her skin.