单词：sufficient and necessary condition
单词：sufficient and necessary condition 相关文章
Old Age Many people mistakenly believe that old age is a time of increased illness and loneliness.In fact, people do not suddenly change when they reach the age of 60 or 65.Consequently,We should not expert more mental illness among the 60 to 70 age
英语专业四级考试指南
such 那么，这样的人，这样的 suck吸，吮 sudden忽然 suffer 遭受，受损失，受害 sufficient足够的，充分的 sugar 糖 suggest 建议，暗示，启发 suggestion建议，意见，暗示 suicide自杀 suit 起诉，诉讼，适合
大学英语四级词汇拼读版
托福作文简洁的建议一： 避免空洞的单词和词组 1. 一些空洞的单词或词组根本不能为句子带来任何相关的或重要的信息，完全可以被删掉。比如下面的句子： When all things are considered， young
TED演讲教育篇
美国文化生活十日谈（二） （二） 美国人的用餐习惯 美国人吃饭用刀叉，而且他们的用餐方式是很有讲究的。因此，在应邀与美国朋友一起吃饭时，应特别注意他们的用餐习惯。一般情况下
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Laurene Powell had been born in New Jersey in 1963 and learned to be self-sufficient at an early age. 劳伦鲍威尔1963年出生在新泽西，很小就学会了自立。 Her father was a Marine Corps pilot who died a hero in a crash in Santa Ana,
乔布斯传
Discount 折扣 A: We can offer you 5% discount. B: Your price is rather out of line, much higher than we expected. We cant buy with your offer. A: Well, what do you suggest then? How about 8%? B: When we say your prices are much too high, we dont me
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