定義法(definition)
定義法是用下定義的方式去揭示事物本質(zhì)特征或概念內(nèi)涵。它能使讀者迅速抓住本質(zhì)屬性和基本特點(diǎn)。此法的句型：
① … is a/the … of … which/that …② … relate to/involve/refer to …
【例】
(1)Language is a system of arbitrary vocal symbols which is used for human communication. 語(yǔ)言是人類用來(lái)交際的任意性的語(yǔ)音符號(hào)體系。
(2)Intermediate goals relate to outcomes during the next few years.
(3)Short-term goals involve outcomes expected during the next 12 months.