WordBook 不仅是一部英语词典，还是一部百科全书，收录了15万个条目，绝佳用户体验，是您学习英语的必备工具。

FETURES:
* 150,000 entries with more than 220,000 definitions, 70,000 usage samples
* 23,000 root word origins (etymologies)
* 120,000 pronunciation guides in International Phonetic Alphabet (IPA) and other notations
* Spoken pronunciations (for all entries)
* Built-in thesaurus and word links connecting words semantically
* Unmatched index, wildcard, anagram search capabilities
* Bookmark (with user's notes) and history management
* Words of the Day: you get to learn new words daily, shake the device for new random words
* Browser-like definition content navigation, ability to tap on any word in the content to look up its definition
* Extending up to 5 web dictionaries to supplement built-in contents
* High resolution graphics for Retina display