adj. refractory
... high-manganesepigiron 高锰生铁 high-melting 难熔的 high-melting-pointalloy 高熔点合金 ...
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难熔的内含物中的那种矿物质，也被认为是最早形成的太阳星云凝结的物质。
The same minerals that occur in refractory inclusions are believed to be the earliest-formed substances to have condensed out of the solar nebula.
这很重要的原因是因为95%的溶解有机物貌似是难熔的。
The reason this matters is that 95% of dissolved organic matter seems to be refractory.
相反，焦博士认为难熔化合物主要是这些“小虫子”应对病毒感染而产生并释放出来的。
Instead, Dr Jiao thinks refractory compounds are made and released by these bugs mainly in response to viral infections.
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