(应用在后台，不执行代码)，系统自动将应用切换到这个状态而不给应用通知。
The app is in the background but is not executing code. The system moves apps to this state automatically and does not notify them before doing so.
您可以从 GCC 得到提示：为每个应用程序维护多个环境变量集，并根据手头的工作从一个集合切换到另一个集合。
You can take a cue from GCC: maintain many sets of environment variables per application and switch from one pool to another depending on the work at-hand.
执行每个实例后，切换到前面描述的应用程序。
After executing each instance, toggle back to the applications described above.
应用推荐