Alaska - Steam rises from the top vent in the summit crater of Mount Redoubt.

阿拉斯加，蒸汽从山顶上的火山口喷发。

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Three crater lakes are located on the eastern summit of Keli Mutu.

三个火山口形成的深湖位于克丽穆图(Keli Mutu)东面的山顶上。

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Magma can erupt to the surface and form lava flows through the volcano's summit (frequently forming a crater), but it can also erupt from lava domes and flank vents along the volcano's sides.

岩浆能喷发出地表，并通过火山峰顶形成熔岩流(大多情况会形成火山口)，但它也能通过火山山体侧面的火山岩圆顶和侧面出口喷发出来。

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This snow-capped volcano, scarcely visible behind a veil of mist, was Professor Lidenbrock's destination - the mountain where an ancient riddle spoke of a crater at the summit that leads to the centre of the Earth.

BBC: An Icelandic journey to the centre of the earth

It was on the summit that Professor Lidenbrock and Axel made their camp, waiting for the shadow of a nearby peak to pinpoint the crater where they were to begin their descent.

BBC: An Icelandic journey to the centre of the earth