单词	heptachlor
释义	heptachlor /ˈhɛptəklɔː / noun [mass noun] A chlorinated hydrocarbon used as an insecticide. Chemical formula: C10H5Cl7. The company that manufactured and sold the pesticides chlordane and heptachlor, the Velsicol Chemical Company of Chicago, threatened to sue Houghton Mifflin.... The sequence of events made no sense: the cows had died several months after the last application of insecticide, but heptachlor volatilized in a few weeks. The mystery was not what had killed the cows - the insecticides had done that - but ‘who is safeguarding the consumer to see that no residues of dieldrin or heptachlor are appearing in the milk?’
随便看	commemorate commemoration commemorative commemorator commemoratory commence commencement commend commendable commendably commendation Commendatore commendatory commensal commensalism commensality commensally commensurability commensurable commensurably commensurate commensurately commensurateness comment commentariat

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