运行时冗长控制：log4j记录程序和附加程序的冗长等级可以在系统启动时配置，并随后在运行时修改。
Runtime verbosity control: the verbosity level of log4j loggers and appenders can be configured at start time and then modified at run time.
特权控制机制是高安全等级操作系统中一个重要的组成部分，它能够提供系统恰当的安全保证级。
As an important component of high-level secure operating systems, the privilege control mechanism can provide an appropriate level of security assurance for the system.
实旖后的控制系统技术先进、安全等级高、质量可靠、操作方便，生产效率大幅度提高。
After transformation, the control system had an advanced technology, a high level of security, reliable quality, convenient operation, substantial increase in production efficiency.
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