5. pessimistic, gloomy, gloominess, depression, depressed, depressing, hopeless, sad, sadness, the blues, blue, unhappy,

low spirits, low-spirited, mournful, dismal, miserable, glum, downheartedness, broken-hearted, down in the

dumps(informal), dejection, despair, despondency, melancholy

pessimistic(a.):悲观的

E.g. Doctors are pessimistic about his chances of making a full recovery.

gloomy (a.): 衰退的, 忧郁的,

E.g. Frank dismissed these gloomy thoughts from her mind.

blue (a.): 这个词可以解释为蓝调即悲伤忧郁的音乐,不过只能用复数形式 blues

E.g. She usually calls her mother when she’s feeling blue.

blue 这个词还有高贵的意思，例如这个短语：blue-blooded 表示出生于皇室家族或者社会地位很高的家族

blue book 一般指英国官方发布的蓝皮书（封面通常是蓝色的）（yellow pages 黄页即包含电话号码和公司地址的

黄色封面的书）

blue movie 色情电影，这种用法差不多已经过时了，现在一般都说 porn

blue chip 蓝筹股即表现优异的，或者值得投资的股票

blue collar 蓝领

6. 表明观点常用词汇：

idea, thought（think）, concept（概念）, view, point，opinion, belief, perspective（角度）, explanation（解释）, prediction

（预测）, result=consequence（结论）,conclusion，

outcome（通过….努力得出的结果）, summary（总结）, aftermath,

expression, statement, announcement, communication, declaration……

notice, indicate（指出，呈现）,show, say, believe, tell, suggest, allege（断言，强烈认为）, conclude, appear to（出现，呈现）, think, point out, argue（狡辩，争辩）, remark（说明）, note, report, reason, discover/ uncover（发现）,

propose, imply, study, refute, claim, disclose, make known, broadcast, communicate, reveal, relate, bring to light,

expose, unveil, lay bare, publicize, openly