English Level 4 Vocabulary是一款设计精良、简单易用、体积小巧的背单词软件。通过真人语音、单词测试、拼写测试、阅读、真题等相结合，助你轻松背单词，让你轻松轻松过4级。广告已被删除！
(English Level 4 Vocabulary is a well-designed, easy-to-use, and compact word-backing software. Through the combination of real voice, word test, spelling test, reading, real questions, etc., it will help you easily memorize words and let you easily pass level 4. Ads have been removed!)
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