Before revision:  In intracellular space, Ca^{2+ the signal may become a global signal fast, and die away in the propagation. To keep the locality of Ca^{2+} signal, the penetrability of is found at an order of magnitude of }\mum Ca^{2+} signal in intracellular space can be regulated through adjusting the initial speed of Ca^{2+ .
After revision:  In intracellular space, Ca^{2+ the 3-dimensional probability distribution of Ca^{2+} signal, the penetrability of is found at an order of magnitude of }\mum Ca^{2+} signal in intracellular space can be regulated through adjusting the initial speed of Ca^{2+ .