In English, vocabulary, like Chinese, refers to the sum of all words, phrases, idioms and slang used in English. English vocabulary is the basis of English learning, because only by learning enough words and phrases can we express ourselves correctly and clearly, understand others' words and read and understand English articles. English vocabulary is rich. According to different needs and occasions, people need to master different types and difficulties of vocabulary, such as basic vocabulary, academic vocabulary, workplace vocabulary, tourism vocabulary and so on. Learning and mastering English vocabulary requires long-term accumulation and constant practice.