In theory, you need molten iron in the core to generate one, but Mercury is so small, its core should have long since solidified.(理論上，你需要核心里的熔化鐵來產生它，但是水星很小，它的核心凝固還要很久。)

Instead, they are shield volcanoes — volcanoes with broad, sloping slides formed by molten rock.(相反，它們是盾狀火山——由熔巖形成的寬而傾斜的滑梯。)

If the glass were kept hot enough, it would flow over the molten tin until the top surface was also flat, horizontal and perfectly parallel to the bottom surface.(如果玻璃保持足夠的溫度，它就會在熔化的錫中流動，直到頂部表面也變得平整、水平，與底部表面完全平行。)

That night, I watched him rappel into the area near a molten volcano on the island of Hawaii.(那天晚上，我看著他順著繩索下到夏威夷島上一個熔化的火山附近地區。)

Molten lava erupted from the top of the volcano.(熔巖從火山頂噴了出來。)

Within the molten interior, under the influence of gravity, different elements were sorted out by density.(在熔體內部，在重力的影響下，（研究人員）根據密度對不同元素進行了分類。)

Devils Tower is a relic of the past, when the molten rock of the earth's core forced its way to the surface to form the throat of a volcano.(魔鬼塔是過去的遺跡，當時地核的熔巖擠出地面，形成了火山的咽喉。)

Cooling like beads of molten metal.(像熔化后的金屬的水珠在慢慢冷卻。)

The molten metal is poured into the mould.(這塊熔化了的金屬被倒入模子。)

The ground had opened to disgorge a boiling stream of molten lava.(地面大開，沸騰的熔巖從中噴出。)

A yellow-hot fountain of molten rock.