active call path的用法和样例：
- Do you know MTR had conducted a raise funds activity call “MTR Race Walking”?
- A list of sponsors for the lease can be supplied with the activation call and additional sponsors can be added at any time while the lease is active.
- After analyzing the feature of the PLCM and based on it,a new control mirror with angle control ability that is called path and path length control mirror(PPLCM) is presented.
- The culture industry is a production to point to be engaged in the culture Product to circulate with provide the culture serves of operate the gross of the activity call.