It is shown that under the quantum conformal fluctuation the expectation values of the proper time and the proper length in any space-time are bounded at Planck time t_p and Planck Length l_prespectively.

• 在这种量子共形起伏下；任何时空的本征时间和本征长度的最小极限分别为普朗克时间 t；和普朗克长度1_p.