不为人知

• Kate is in bad with lucy for some unknown reason
  因为某些不为人知的原因,凯特和露西关系不好。
• There is something going on around here
  这里面有些事情不为人知
• ' cause that tape said we have more in common than we know
  因为上面说我们有很多不为人知的共同点
• His secret died with him , for he never told anyone
  他的秘密至死也不为人知，因为他从未告诉过别人。
• His secret died with him , for he had never told anyone
  他的秘密至死也不为人知，因他从未告诉别人。
• Folk ballads have no known authors
  民谣的作者通常不为人知。
• At last , the miners struck on an undiscovered gold mine
  最后，矿工们突然发现了一个不为人知的金矿。
• From some terrible , dark secret
  一些可怕的不为人知的秘密
• Buried on an island that cannot be found except for those who know where it is
  被埋在一个不为人知的小岛上
• Sammi , the wife of a model police officer is shot in an accident
  一种不为人知的行业在殓房当听差行内俗. .