active environment group的用法和样例：
- An environment group took these photos in China in April.
- It is frequently accelerated by the presence of an active environment and by triaxial stress.
- The client application code page is determined by the active environment variable.
- The glaciers are melting in the Himalayan Mountains. An environment group took these photos in China in April.
- For the UNIX operating system, the active environment will be derived from locale setting including language, territory, and code set.