说明文英语作文【一】
定义法是用下定义的方式去揭示事物本质特征或概念内涵。它能使读者迅速抓住本质属性和基本特点。此法的句型：
① … is a/the … of … which/that …② … relate to/involve/refer to …
【例】
(1Language is a system of arbitrary vocal symbols which is used for human communication. 语言是人类用来交际的任意性的语音符号体系。
(2Intermediate goals relate to outcomes during the next few years.
(3Short-term goals involve outcomes expected during the next 12 months.
说明文英语作文【二】
Everyone has goals. Many people do not reach their goals for lack of planning. These three sets of goals should be developed: lifetime, intermediate and short term.
Lifetime goals should be written out. These goals should be clear and reasonable. F
or instance, the goal to win a research prize is clear and measurable. Other lifetime goals might include publishing a certain number of influential books or articles, earning a departmental chairmanship at a major university, successfully competing for a grant from the National Science Foundation or securing a consultantship with a big corporation. Intermediate goals relate to outcomes during the next few years. For the beginning doctoral student, intermediate goals may include completion of course work and preparation of a doctoral research proposal. Like lifetime goals, these are measurable and clearly stated.
Short-term goals involve outcomes expected during the next 12 months. These goals are more performance oriented, and they help with achievement of intermediate goals. Examples of short-term goals are earning an A in a course, learning how to program a computer or performing an experiment.
说明文英语作文【三】
举例法就是举出实际事例来说明事物的方法，是最常见，往往也是最有效的阐释模式。
提醒
举例时应挑选具体、典型且有能力表达清楚的`例子，并注意按照一定的顺序编排。
请看上述范文第二段：“For instance”引出“lifetime goals”的实例，如，赢得研究奖金、出版有影响书或文章、获得大学的系主任职位、获得国家自然科学基金及大公司稳定的顾问职位。
