activity and variability characteristics的用法和样例：
- Progress in the Studies on 150-day Period of the Solar Activity and Variability
- Given an activity and variables referenced by this activity (called slicing criterion), one can analyze and obtain the process segment which influences the slicing criterion during process slicing.
- He was very active and rode down several horses.
- Winds are mainly light and variable.
- Enterpise activity and macro-management.