成语故事大全
　 如果汉语是浩瀚的大海，成语就是其中美丽的贝壳，成语故事就是贝壳里的珍珠。成语作为语言的精华、历史的缩影、文明的积淀、智慧的浓缩，处处闪烁着睿智的光芒，是中华民族的文化瑰宝。成语故事则是历史文化的智慧凝结，是各个历史时代的产物，蕴含着丰富的历史知识和深刻的道理。

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The second edition of the Oxford Dictionary of Astronomy contains over 4,300 up-to-date entries covering all aspects of astronomy. Compiled with the help of over 20 expert contributors under the editorship of renowned author and broadcaster Ian Ridpath, A Dictionary of Astronomy covers everything from space exploration and the equipment involved, to astrophysics, cosmology, and the concept of time.

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As a new speaker of English, you may hear some expressions in your daily conversations that you do not understand--yet. McGraw-Hill's Conversational American English will help you learn these expressions, so not only do you know what a person is saying to you, but that you can use the expression yourself!

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A useful guide to everyday American English to help you understand meanings and avoid difficulty in translation.

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WordNet® is a large lexical database of English with up to 140,000 entries and more than 1.4 million words, developed by the Cognitive Science Laboratory at Princeton University.

Word Checker (WC) has evolved. A simple utility to check whether your words are acceptable to use in various word games such such as: Scrabble, lexilous, Words with Friends and WordFeud. Using the popular SOWPODS dictionary (American and British English - used internationally for tournaments), TWL (U.S. Canada and Thailand) and ENABLE this application sorts out whether you are a lexical master or just a syntactical blagger.