1. Men are pigs. This is no secret. 男人是猪，这已经不是秘密了。
2. What is the secret of your success? 什么是您成功的秘诀是什么？
3. What was his secret? 他的秘诀是甚么？
英英解释
n.
1. something that should remain hidden from others (especially information that is not to be passed on)
2. information known only to a special group
3. something that baffles understanding and cannot be explained adj.
1. not open or public; kept private or not revealed
2. conducted with or marked by hidden aims or methods
3. not openly made known
4. communicated covertly
5. not expressed
6. designed to elude detection
7. hidden from general view or use
8. (of information) given in confidence or in secret
9. indulging only covertly
10. having an import not apparent to the senses nor obvious to the intelligence; beyond ordinary underst
11. the next to highest level of official classification for documents
