他们知道如果一个核反应堆熔化，这会成为影响巨大范围和大量人民的主要灾难，他们牺牲自己的生命试图阻止这一切。
They know that if there is a reactor meltdown it could be a major disaster affecting huge areas and massive Numbers of people, and they are risking their lives to try and prevent that.
通过测试各个配方的熔化特性，选择其中处于合理范围的配方。
The melting behavior of each formulation was tested and the rational formulation was chosen.
在试验的喷距范围内，喷距对粉末的熔化状态和涂层结合强度均无明显影响。
The melting state of powder and bonding strength of coating did not vary much within spraying distance in the experiment.
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