Nonbiodegradable pollutants, such as certain chlorinated hydrocarbon pesticides (e.g.DDT) and heavy metals, such as lead, copper, and zinc in some industrial effluents, accumulate in the environment.
生物不可降解的污
,如氯代烃类杀虫剂(如DDT)和工业
中的重金属,如铅、铜和锌,在环境中积累。
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Even before World War Two, scientists had known about the potential energy inside uranium, the heaviest metal in the periodic table a diagram which groups the chemical elements into rows and columns according to their atomic number and symbol.
甚至在第二次世界大战之前,科学家们就已经知道铀内部
势能。铀
元素周期表中最重
金属,元素周期表
根据原子序数和原子符号将化学元素分成行和列
图表。
集
集
集
集