每块阿伦德碎片样本都覆盖着一层黑色的、玻璃样的熔壳，这层熔壳是在它们的外表面与地球大气层摩擦减速中熔化形成的。
Individual specimens of Allende are covered with a black, glassy crust that formed when their exteriors melted as they were slowed by Earth's atmosphere.
反应堆彻底熔化的危险性看起来很低，可是放射性物质已经被探测到随发电站出来的水蒸气一同泄露到大气中。
While the danger of a total meltdown at the reactor appears to be very low, radioactive materials have been detected leaking into the atmosphere along with steam from the plant.
四者中拥有最高温度的是金星，而原因很简单——由于有稠密的大气层，金星从太阳吸收的热量无法“逃”到太空中，它的表面温度高达500摄氏度——足以使铅熔化。
Due to its dense atmosphere, heat that reaches Venus from the sun can't escape into space. Surface temperatures can reach around 500 degrees Celsius -- hot enough to melt lead!
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