Molten lava erupted from the top of the volcano.

熔岩从火山顶喷了出来。

a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt.

喷发熔化的火山岩和气体的地球外壳（或是其他行星的表面）的裂缝。

Perhaps you have seen colorful limestone cave and underground river, but the eighteen caves here are Mesozoic lava land forms, which is produced by the movement, cracking and weathering of the earth's

或许你见过绚丽多彩的石灰熔洞和地下暗河，但在这里的十八个山洞却是中生代火山岩地貌，由于地壳运动断裂风化形成的。

This is an active volcano which spews out lava every year.

这是个每年喷熔岩的活火山。

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