1. nothing:Oxford Advanced Learner's Dictionary(牛津高阶)
2. nothing:Longman Dictionary of Contemporary English(朗文当代)
3. nothing:Merriam-Webster's Learner's Dictionary( 韦氏高阶)
4. nothing:Collins COBUILD Advanced English Dictionary(柯林斯高阶)
5. nothing:Cambridge Learner's Dictionary(剑桥高级学习词典)
6. nothing:Macmillan English Dictionary(麦克米兰)
B 普通英语词典(英文，释义准确权威，但理解有难度，专业人士或本族语者使用)：
7. nothing:Oxford Dictionary
8. nothing:Merriam-Webster's Dictionary
9. nothing: Cambridge Academic Content Dictionary(剑桥学术词典)
10. nothing: American Heritage Dictionary(美国传统词典)
11. nothing:Wiktionary
C 双语词典(英汉汉英翻译词典)：
12. nothing:爱词霸词典
13. nothing:海词词典
14. nothing:有道词典
15. nothing:必应词典
D 其它词典：
16. nothing:Wordsmyth Beginner's Dictionary(Children's Dictionary)
17. nothing:Oxford Collocation Dictionary(牛津英语搭配词典)
18. nothing:Idiom Dictionary(习语词典)