trace contaminant meaning in Chinese

痕量染污物
痕量污染物

Consumers should not allow misplaced fears about trace contaminants to become a barrier to achieving the 5 - a - day target
消费者不应该任由因对少数污染物的盲目恐惧而使之成为达到天天五蔬果目标的障碍。
Industries with particularly high potential exposures include : construction work involving welding , cutting , brazing or polishing on lead surfaces and application of lead solder ; most smelter operations either as a trace contaminant or as a major product ; secondary lead smelters where lead is recovered from batteries ; and firing ranges
有机会接触铅的工作包括：在建筑业中，在含铅的表面上进行焊接切割镀焊或打磨粉饰以及使用铅锡作焊接在采矿业中，提炼铅或其他元素的工种在回收业中，把电池中的铅再循环利用以及弹药制造工作。