| 词组 | chemical |
| 释义 | chemical AC /ˈkemɪkəl/ noun a substance used in chemistry or produced by a chemical processadjectivesdangerous/harmful/hazardous chemicals The sign on the truck said that it was carrying hazardous chemicals. | Many cleaning products contain chemicals that can be harmful.toxic/poisonous chemicals (=harmful to people and other living things) The chemicals that were released were highly toxic.industrial/agricultural chemicals Some deaths from cancer are related to industrial chemicals.household chemicals (=used for cleaning etc in the home) Keep household chemicals out of reach of children.synthetic chemicals (=made by mixing artificial substances) None of us lives in an environment that is free from synthetic chemicals.verbsuse chemicals Farmers use chemicals to kill insects that would destroy their crops.produce chemicals Some plants produce toxic chemicals to protect themselves.release chemicals When we laugh, our brains release chemicals that make us feel good.contain chemicals Tobacco smoke contains thousands of different chemicals.be exposed to chemicals Many of the workers at the factory were regularly exposed to dangerous chemicals.a chemical reacts with another chemical In a rocket, two chemicals react with each other to provide a great deal of heat.chemical + nounsa chemical reaction The carbon dioxide is produced as a result of a chemical reaction.a chemical element (=a basic substance that consists of one type of atom) Silver is a chemical element whose symbol is Ag.a chemical compound (=a substance that consists of two or more elements) DNA is a complex chemical compound.a chemical symbol The chemical symbol for Hydrogen is H.a chemical agent technical (=a chemical that has an effect on other chemicals) Different chemical agents cause different kinds of change.the chemical industry The chemical industry is one of the most important industrial sectors.a chemical plant/factory There has been an explosion at a chemical plant in Germany.a chemical fertilizer (=a chemical to help plants grow) Many crops are grown with chemical fertilizers.chemical waste People who illegally dump chemical waste will be given prison sentences.chemical weapons (=poisonous chemicals used as weapons) The treaty banned chemical weapons.chemical warfare There is now also the threat of chemical warfare. |
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