各种在线词典

百度汉语：

https://hanyu.baidu.com/

词典：

Top 5 monolingual Learner's Dictionaries are

1. **** Cambridge Dictionary http://dictionary.cambridge.org/

2. Longman Dictionary http://www.ldoceonline.com/

3. Oxford Collocations Dictionary http://www.ozdic.com/

4. Thesaurus.com http://www.thesaurus.com/

5. Oxford Dictionaries https://en.oxforddictionaries.com/

6. **** M-W http://learnersdictionary.com/

7. ****Chinese-English  https://cn.bing.com/dict/

8. ****Chinese-English http://dict.cn/

http://dict.baidu.com/

http://dict.youdao.com/

http://www.iciba.com/

http://www.freecollocation.com/

https://www.thesaurus.com/

https://www.wordhippo.com/

https://www.thesaurus.com/browse/investigate?s=t

https://www.ispeech.org/