| 单词 | chemical |
| 释义 | chemical adj. & n. --adj of, made by, or employing chemistry or chemicals. --n a substance obtained or used in chemistry. Phrases and idioms chemical bond the force holding atoms together in a molecule or crystal. chemical engineer one engaged in chemical engineering, esp. professionally. chemical engineering the design, manufacture, and operation of industrial chemical plants. chemical reaction a process that involves change in the structure of atoms, molecules, or ions. chemical warfare warfare using poison gas and other chemicals. fine chemicals chemicals of high purity usu. used in small amounts. heavy chemicals bulk chemicals used in industry and agriculture. Derivatives chemically adv. Etymology: chemic alchemic f. F chimique or mod.L chimicus, chymicus, f. med.L alchymicus: see ALCHEMY |
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