Mining these metals from the earth and using them in society-as leaded gasoline or silver-mercury tooth amalgam, for example-have brought all of us into regular exposure with them.

 
  • 采矿业从地下采出各种金属,经过加工之后,应用在人类生活的各个方面,在造福人类的同时,也对人类的健康造成了危害。
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