require /riˈkwaiə/ vt. 需要，要求；规定（跟名词/代词、v-ing主动式或不定式的被动式、从句和不定式的复合宾语）：a required subject (AmE.) 必修课 I require warm clothing for the winter.我需要御寒衣物过冬。The work requires patience.这工作需要耐心。Our classroom requires cleaning/to be cleaned.我们的教室需要打扫。They required me to keep silent.他们要求我保持沉默。We required that he (should) get there before nine. 我们要求他九点前到那儿。 require of…对…的要求：［考句］ He will agree to do what you require of him. 他会同意做你要求他做的事情。
requirement /riˈkwaiəmənt/ n. ［c］ 1. 必需品，要求物：requirements for everyday life 日常生活必需品；requirement for travel/travelling requirements 旅行用的必需品 2. 必要条件；资格；规定：to obey all the requirements of the law. 完全服从法律的规定；fulfil the requirements of the law 履行法律的规定；meet someone’s requirements 符合某人的要求［考句］One of the requirements for a fire is that the material be heated to its burning temperature.燃烧的条件之一是把燃料加热到其燃点。（requirement作主语时，其表语从句里要用should + 动词原型的虚拟语气，should可以省略）
