In theory, you need molten iron in the core to generate one, but Mercury is so small, its core should have long since solidified.(理论上,你需要核心里的熔化铁来产生它,但是水星很小,它的核心凝固还要很久。)
Instead, they are shield volcanoes — volcanoes with broad, sloping slides formed by molten rock.(相反,它们是盾状火山——由熔岩形成的宽而倾斜的滑梯。)
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.(如果玻璃保持足够的温度,它就会在熔化的锡中流动,直到顶部表面也变得平整、水平,与底部表面完全平行。)
That night, I watched him rappel into the area near a molten volcano on the island of Hawaii.(那天晚上,我看着他顺着绳索下到夏威夷岛上一个熔化的火山附近地区。)
Molten lava erupted from the top of the volcano.(熔岩从火山顶喷了出来。)
Within the molten interior, under the influence of gravity, different elements were sorted out by density.(在熔体内部,在重力的影响下,(研究人员)根据密度对不同元素进行了分类。)
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.(魔鬼塔是过去的遗迹,当时地核的熔岩挤出地面,形成了火山的咽喉。)
Cooling like beads of molten metal.(像熔化后的金属的水珠在慢慢冷却。)
The molten metal is poured into the mould.(这块熔化了的金属被倒入模子。)
The ground had opened to disgorge a boiling stream of molten lava.(地面大开,沸腾的熔岩从中喷出。)