它使土壤温度保持足够的温度，并让微生物保持活跃。
It allows the temperature of the soil to remain warm enough for microbes to remain active.
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。
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.
到目前为止，这场灾难给我们最大的教训可能是，我们手中必须准备足够的紧急电源来保持反应堆水循环的温度，阻止反应堆融化。
So far, the all-important lesson would seem to be: have sufficient emergency power at hand to keep cooling water circulating in the reactors to prevent a meltdown.
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