And massive caldera at some of it could easily swallow greater London, Paris and New York.

一些巨大的山口喷火能轻易地吞下伦敦、巴黎和纽约。

The landslide and collapsing walls likely let seawater, air, and other atmospheric gas flood into the crumbling caldera, reacting with the magma inside.

山体滑坡和坍塌的墙体有极大可能让海水、空气和其他大气气体涌入崩塌的火山口，与内部岩浆发。

At only half the size of Mount Everest, it was once a 4,000 meter tall stratovolcano which melted down to a 1109 meter deep caldera.

它只有珠峰的一半大小，曾是 4000 米高的成火山融化成 1109 米深的破火山口。

Interestingly it's composed of we think three separate volcanos or at least it's erupted in three different ways, if you...fly over the top you see three separate calderas.

有趣的是，我们认为它是由三座火山组成的，或至少以三种不同的方式喷发，如果你...在它顶上飞过，你会看到三个分开的火山口。

If anybody actually survived this, climbing Everest would be a whole new experience, and probably a lot easier to accomplish as a much smaller and hollowed out caldera.

如果真的有人能够幸免于难，攀登珠峰将是一个全新的体验，也可能会变得更加容易完成，因为它变得更小，且成为了一个中空的破火山口。

The most famous attraction in Flores is the Kelimutu volcano caldera, which has three lakes fed by volcanic gas that change color according to the amount of oxidation in the water.

弗洛勒斯最著名的景点是“克利穆图火山口”，它有三个湖，由火山气体构成，火山气体会根据水中的氧化程度改变颜色。

Major types include stratovolcanoes which often appear as tall steep mountains, shield volcanoes which are flatter and dome-shaped, calderas which are large depressions in the ground and mid-ocean ridges which are underwater chains of volcanic mountains.

状火山，通常看起来像陡峭的高山；盾状火山，平坦呈圆顶状；火山口，地面上的大洼地；大洋中脊，海底的火山山脉。