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系统的语法讲解，原汁原味的英文解释 Free online resources for learning English or teaching it. Everything from easy grammar guides to fun games and quizzes.

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1Checker is your ideal solution for proofreading. With spelling check, grammar check, style review, vocabulary enrichment, dictionary, translation, and more benefits all packed in one. 1Checker is your ideal solution for proofreading. With spelling check, grammar check, style review, vocabulary enrichment, dictionary, translation, and more benefits all packed in one.

适合快速查找语法点，划分细致，例句充足。准确度高，属于国外的语法体系 Improve and update your knowledge of English grammar with contrastive examples, modern descriptions, contexts, images, diagrams, quizzes, editing exercises.

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