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。

No pains, no gains. 不劳无获。

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。

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

5. of vital importance至关重要的

Examples:

Safety is of vital importance. 安全第一。

The quality of Chinese economic data has not risen as rapidly as China's importance in the global economy.

中国经济数据的质量的提升还没有赶上中国在全球经济中重要性的上升速度。

6. quality of life生活品质,生活质量

Example:

In the last two decades our quality of  life has been improved enormously.

在过去的二十年里我们的生活质量有很大的提高。

7.option  

英汉解释

n.众多选择之一; 选修课

英英解释

n. one of a number of things from which only one can be chosen; the act of choosing or selecting

同义词

n. alternative，choice，pick，selection

Examples：

These are just a few of the many options available.

这些只不过是众多可能的选择中的几个。

Several options are offered for the student's senior year.

为毕业班学生开设了几门选修课。

8.perspective

英汉解释

n. 观点；看法;远景

英英解释

n. a way of regarding situations or topics etc; the appearance of things relative to one another as determined by their distance from the viewer

同义词

n. linear perspective，position，view

Example：

He says the death of his father 18 months ago has given him a new perspective on life.

他说18个月前父亲的去世让他对人生有了新的认识。

So from the global perspective, it is very important.

所以从全局的角度来看，这是很重要的。