a person who lives in and can vote in a constituency （选区的）选民，选举人 one of the parts of something that combine to form the whole 成分；构成要素 Silicon and oxygen are the fundamental constituents of rocks in the earth’s crust. 硅和氧是地壳中岩石的基本成分。 Tar is a harmful constituent of tobacco smoke. 焦油是烟草烟雾的有害成分。 Vitamins are natural food constituents which are essential in helping to maintain good health. 维生素是天然的食物成分，对保持健康至关重要。
Word Originlate 15th cent. (as a noun denoting a person who appoints another as agent): from Latin constituent- (partly via French constituant) ‘establishing, appointing’, from the verb constituere, from con- ‘together’ + statuere ‘set up’.