研究发现，采自全国291条河流的鱼样中，都含有一种易被人体吸收的汞——甲基汞。
It found traces of methylmercury, a form of mercury that is readily absorbed, in every fish sampled in 291 streams across the country.
本文对长白山区部分易混的药用植物进行了鉴别，减少了误采、误用药用植物现象的发生。
Some easily - confused medicinal plants in Changbai Mountain area were distinguished andmispicking and mistaking medicinal plants can be reduced.
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