火山喷发后，大量熔岩顺着山坡流下来。

huǒshān pēnfā hòu, dàliàng róngyán shùnzhe shānpō liú xiàlái.

After the volcanic eruption, a large amount of lava flowed down the mountainside.

科学家们正在研究这种熔岩的化学成分。

kēxuéjiāmen zhèngzài yánjiū zhè zhǒng róngyán de huàxué chéngfèn.

Scientists are studying the chemical composition of this lava.

熔岩冷却之后形成了独特的地貌。

róngyán lěngquè zhīhòu xíngchéng le dútè de dìmào.

After the lava cooled, it formed a unique landscape.