Researchers compiled a composite index of "water threats" that includes issues such as scarcity and pollution.

研究人员编制了“水威胁”综合指数，其中包括水短缺和污染之类的问题。

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The advantages of the recently developed composite materials are energy saving, performance efficient, corrosion resistant, long service time, and without environmental pollution.

最新开发的复合材料具有节能，性能好，抗腐蚀，寿命长和无污染等五大优势。

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Ceramic particle of in situ synthesis avoids pollution and wettability existing in casting technique, so it is valuable to fabricate Fe matrix composite with better properties.

增强体原位合成避免了其污染问题，也解决了熔铸过程中存在的两相润湿性问题，有利于制备性能更好的复合材料。

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