1.gain

英汉解释 vt. （指经过努力）获得；获取 n. 增加；利润；收获 英英解释 vt.gain more or obtain more，especially after a lot of hard work or effort n. a quantity that is added; the advantageous quality of being beneficial; the amount by which the revenue of a business exceeds its cost of operating

同义词 n. addition，amplification，increase，profit v. acquire，benefit，derive

反义词 n. loss，red，red ink v. drop off，fall back，lose，lose weight

gain more knowledge获得更多知识

Examples: They realize that passing examinations is no longer enough to gain a place at university. 他们认识到现在仅仅是考试通过，不能确保进入大学。

Students can gain valuable experience by working on the campus radio or magazine. 学生们在校广播台或校刊工作能够获得宝贵的经验。

2.get the message across=make somebody understand使人意识到,使人明白的意思

Examples:

We need to get the message across that too much sun is dangerous. 我们需要让大家知道过多的日晒是很危险的。

No pains, no gains. 不劳无获。

3.构词法：动词的ing形式加上另外一个词构成，比如我们可以说

举重weight lifting 逛商场window-shopping 空调air-conditioning 集中供暖central heating 数据处理data processing 计划生育family planning 食物中毒food poisoning

4.course n.课程

a three-year course为期3年的课程 a training course实习课程 a writing course写作课程 a required course 必修课程

词汇辨析 class，lesson，lecture，course这些名词均含“课”之意。 class 从“班级”引申指学生在一起上课，还可表示“(一节)课”。 lesson 主要指教材中的一课或每次授课的单位时间。 lecture 指讲课。 course 指在一段时间内教完或学完的完整的课程。

Example: In colleges of engineering the higher mathematics has become a required course. 在工科院校，高等数学已成为学生的必修课程