有用热量
双语例句原声例句
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当镁与水混合在一起时，它就会产生热量，让水沸腾产生蒸汽，而产生的蒸汽然后就可以驱动涡轮机，而且也可用来做些有用的工作。
When the magnesium is mixed with water, it produces heat, boiling the water to produce steam, which can then drive a turbine and do useful work.
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这些材料会吸收高达90%的太阳热量——在新英格兰地区，这点通常都很有用，但在得克萨斯就不那么有用处了。
These materials absorb as much as 90 percent of the sun's heat energy - often useful in New England, but less so in Texas.
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某些地区还有用于灌溉计算的相关仪表，而阴凉、热量和成本数据需要因地制宜进行计算。
Related instruments exist for irrigation calculations in certain regions, but shading, thermal, and cost data require site-specific calculations.
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However, the thing to remember is, when you look at heats of reaction under those conditions it's all well and good.
相反，需要记住，当你需要知道反应中放出的热量时,这些量是很有用的。
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