未知

• This ignorance precludes the full theoretical calculation of wave forms necessary to compare with relevant observations .
  这种未知使我们无法作出所必需的理论计算，以与有关观测结果相比较。
• In order to define this irrotationality condition mathematically, let us consider the equation of motion in terms of velocities .
  为了从数学上确定此无旋性条件，我们考虑以速度为未知函数的运动方程。
• How the prisoner escaped remains a mystery
  囚犯们是如何逃脱的是一个未知之谜！
• The error with the path is unknown but it is invalid
  路径无效，错误原因未知。
• How much he might recover is still not clear
  他能恢复到什么程度现在还是未知。
• 551 requested action aborted . page type unknown . +
  请求操作中止，页面类型未知。
• Four new ceramides from an unknown marine sponge
  未知种属海绵中4个新的神经酰胺
• The result of the operation could not be determined
  未知。操作结果无法确定。
• Young men willing to sacrifice so much of themselves
  这些孩子们为了未知的结果
• The returned value can be zero if it is unknown
  如果未知，则返回值可能为零。