1. 这是我的新号码，天知地知，你知我知。
This is my new phonenumber, and just between you and me.
2. 这事只有天知地知，你知我知。
It'd just be between you and me.
3. 让我从梦中彻底地清醒过来，天知地知你知我知
Let me thoroughly from the dream to wake up day to know to know I know...
4. 天知地知，你知我知。
You know about it, I know about it, nobody else.
5. 如果你的一个朋友有个重要的秘密希望天知地知你知他知，他把这个秘密告诉你会不会犯了个大错呢？
If a friend have an important secret and didn't want other people to learn about it, would telling you the secret be a big mistake?