1. Oh, this is called an eruptive vent.原来这叫喷气口啊。youdao2. After the lava around the eruptive vent cooled down.喷气口四周的岩浆冷却凝固之后。youdao3. After the lava around the eruptive vent cooled down.喷气口四周的岩浆冷却凝固之后。youdao