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n 替代(換，補(bǔ))者(物)，代用品(物)(person or thing that acts or is used in place of another)[C][N (for)]：find a～to play in sb's place尋找一名替身代某人打球;send one's deputy as a～派副手作為代表;a sugar～食糖的代用品;a～for leather/sugar/wine 皮革/食糖/葡萄酒的代用品;a～for a baseball pitcher一名壘球替補(bǔ)投手;There is no～for champagne/good food/exercise. 沒有能代替香檳/美食/鍛煉的東西。Try to make a list of these expressions and suggest～s for them. 試著把這些詞語列個(gè)表并提出他們的替換詞。～players/horses 替補(bǔ)球員/馬匹;〖同〗alternate，replacement，standby;

v(1)用……代替(替換)(put sb/sth in place of sb/sth)[T+n，T+n+prep (for)]：They didn't like potatoes，so we～d rice. 他們不喜歡土豆，所以我們換上了米飯。～walnuts for pecans in the recipe/a fake diamond for the original 以核桃代替食譜中的美洲山核桃/假鉆石代替真鉆石;～the better kind 以次充好;～X for Y in the equation 在方程式中用X代替Y;

(2)代替，替代(act as a substitute)[I+prep(for)]：be～ing for a teacher who is ill 正在代替一位生病的教師;Water can～for wine. 水可以代替酒。 Honey can～sugar. 蜂蜜可以代替糖。

→substi′tution n 代替;替換;取代;

【辨異】substitute與displace和replace的區(qū)別見REPLACE。