例如，人们以前认为铟的原子质量介于砷和硒之间。
Indium, for example, had previously been assigned an atomic mass between those of arsenic and selenium.
煤灰渣含有多种危险物质，包括砷、铅、硒等，然而田纳西流域管理局起先矢口否认煤灰渣中含有对健康有害的物质。
Coal ash is known to contain dangerous elements including arsenic, lead, and selenium, yet the TVA refused at first to issue any health warnings about contamination from the spill.
康强硒及硒多糖可有效拮抗砷的这种毒作用。
Kangqing Selenium and Selenium Polysaccharide could a - gainst the effects of arsenic.
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