兰州雅思词汇
常见前缀
表示否定意义的前缀：a-, an-, asymmetry（不对称）, anhydrous（无水的）, dis-, dishonest, dislike, in-, ig-, il, im, ir, incapable, inability, ignoble, impossible, immoral, illegal, irregular, ne-, n-, none, neither, never, non-, noesense, neg-, neglect, un-, unemployment。
表示错误的意义：male-, mal-, malfunction, maladjustment（失调）, mis-, mistake, mislead, pseudo-, pseudonym（假名）, pseudoscience。
表示反动作的意思：de-, defend, demodulation（解调）, dis-, disarm, disconnect, un-, unload, uncover。
表示相反，相互对立意思：anti-, ant- antiknock（防震）, antiforeign（排外的）, contra-, contre-, contro-, contradiction, controflow（逆流）, counter-, counterreaction, counterbalance, ob-, oc-。
高频基础词汇
Numbers（数字）：one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve, twenty, thirty, hundred, thousand, million, billion。
Colors（颜色）：red, blue, green, yellow, black, white, orange, purple, pink, brown。
Days of the Week（星期）：Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday。
Months of the Year（月份）：January, February, March, April, May, June, July, August, September, October, November, December。
Common Phrases（常用短语）：Hello, goodbye, please, thank you, sorry, yes, no, excuse me, I don't know, how are you？