我不知道那是什么

• I do not know what that is
  我不知道那是什么。
• I don ' t know what it is . .
  我不知道那是什么，
• I get this feeling that there ' s something out there , and it frustrates me that i don ' t know what it is
  我有这种感觉某物在那儿，和它让我感觉灰心但是我不知道那是什么。
• I did not recognize it during my younger days , but i realized then and there that what i had seen was an invisible being
  年幼时，我不知道那是什么，可是现在，我才恍然大悟，原来那就是个无形的众生。