chem‧i‧cal S3 W3 AC / kemɪk ə l / 名词 [可数名词] #

a substance used in chemistry or produced by a chemical process

toxic/hazardous/dangerous chemicals

the organic chemicals industry

synthetic chemicals

COLLOCATIONS

形容词

dangerous/harmful Many cleaning products contain chemicals that can be harmful.

hazardous (= very dangerous ) There are major problems over the disposal of hazardous chemicals.

toxic/poisonous (= containing poison ) The chemicals that were released were highly toxic.

synthetic chemicals (= made by mixing artificial substances ) A synthetic chemical is, in theory, identical to that found in nature.

organic chemicals (= containing natural substances including carbon ) Oil and coal are known as organic chemicals.

industrial/agricultural chemicals (= used in industry/in farming ) Some deaths from cancer are related to industrial chemicals.

动词

use chemicals Farmers use chemicals to kill insects that would destroy their crops.

produce chemicals the dangerous chemicals produced by burning oil

be exposed to chemicals Some of the troops were exposed to chemicals.

chemical + NOUN

the chemical industry The chemical industry is one of the most important industrial sectors.

a chemical plant (= factory producing chemicals ) There has been an explosion at a chemical plant in Germany.

a chemical fertilizer (= chemicals to help plants grow ) Many crops are grown with chemical fertilizers.

chemical waste the risks from pollution and chemical waste

chemical weapons (= poisonous chemicals used as weapons ) a global treaty banning chemical weapons

chemical warfare (= the use of chemical weapons in wars ) There is now also the threat of chemical warfare.

chemical W3 AC adjective [仅用于名词前] #

relating to substances, the study of substances, or processes involving changes in substances :
the chemical composition of bleach a chemical analysis of the soil

— chemically / -kli / adverb :
Chemically, the substances are similar.