【trace_materials】什么意思_英语trace_materials的翻译_音标_读音_用法_例句_在线翻译

trace materials

痕量物质

... 痕量元素trace elements 痕量物质trace materials 交通噪音traffic noise ...

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Many were items that were stripped out of the counter-terrorism legislation earlier in the year -- authority for roving wiretaps and taggants to trace explosive materials.

CNN: D.C. Brigadoon -- Applaud It While It Lasts!
Rather, as a consequence of injecting water and sand into the shale formation to crack the rocks so gas and oil will flow, massive amounts of waste water comes back to the surface with significant amounts of contaminants as a result of leaching out salt, heavy metals and trace amounts of radioactive materials from the rock formation itself.

FORBES: U.S. Energy Independence - So Close, Yet So Far
New regulations likely to be proposed by the State Department next year may follow guidelines being drafted by the UN and the OECD, a rich-country club, that will advise companies on how best to trace the origin of their materials.

ECONOMIST: Congo's conflict minerals

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