He was one of 80 middle students from China attending a month-long “Youth Summit”. The Youth Summit was aimed at increasing understanding and friendship between young students of the two countries through visits and discussion.

短文对Youth Summit下了定义，是一种为加强中美学生理解与友谊的活动

2．同义、反义词判断法

同义词标志有：or, like, similarly, etc.往往是为了避免重复；反义词标志有：yet, while, but, however, although, instead of, on the other hand, on the contrary, etc.

e.g. Mr. white lives to talk and his wife is similarly loquacious.(饶舌的 )

Some people like to walk quickly home after work, but I prefer to stroll home and look at the store windows along the way.（漫步，闲逛）

Tom is lazy while his brother is industrious. “while”表转折，连接两个并列句，由上半句的“ lazy”可知，“ industrious”是它的反义词，可大概猜测为“勤快，勤奋”之意。

3. 同位关系判断法

同位关系表示两个词表达的意思相同，A即B， B即 A，若知其一，另一词意思不言自明。

Professor Wang was an expert in phonetics, the study of the sounds of language.(语音学 )

4. 因果关系判断法

The biggest power failure happened yesterday. All of our ice-cream and frozen foods melted.

前一句的情况导致后一句的结果，线索是因果关系。既然停电，冰激凌、冷冻食品解冻是必然结果，“melt”猜测为“融化”。

5．常识判断法

e.g. Water usually boils at 100 centigrade.（摄氏度）

It’s dawn. The sun hasn’t come out yet.（黎明）

太阳还没出来，即黎明时分。

6．句法功能判断法

e.g. Bananas, oranges, pineapples, coconuts and some other kinds of fruit grow in warm areas.

从句中可知，bananas…coconuts都是在列举一些热带水果，大概判断pineapples（菠萝）coconuts（椰子）都为水果名就足矣。

7．上下文暗示判断法

e.g. since cats have moods similar to those of human’s, some experts believe that people can improve their moods and attitude by catnapping. People might become happier and more positive

从上文叙述可知，人们像猫那样小睡之后会恢复精力，从而变得愉快积极。

When he studied Aristotle’s theory of falling objects, Galieo tried the experiment again and again and proved that it didn’t hold water.

通过句意得知：伽俐略通过反复的实验推翻了亚里士多德的落体理论，证明它是不对的。习语 “not hold water”并非“不盛水”而是“站不住脚”。

8．构词法判断法

He laughed and shrugged, “I have no choice.” He said, “ I must admit it is unavoidable.”

我们知道词根avoid是 “避免”之意，avoidable就是“可避免的”前缀 un表示否定、相反，所以可推测出unavoidable为“不可避免的”。