优先级：不重要的任务的优先级低(反之亦然)。
Priorities: Less important tasks should start with lower priority (the converse is also true).
条件运算符的优先级比按位运算符的优先级低。
The conditional operator has lower precedence than bitwise operators.
优先级或者说操作符的强度决定求值顺序；优先级高的操作符比优先级低的操作符先求值。
Precedence or operator strength determines order of evaluation; an operator with higher precedence is evaluated before one of lower precedence.
一个线程创建了一个比自己优先级低的线程，但是一个有更高优先级的线程正在另一个处理器上运行。
A new thread is created that has a lower priority than its creator, but a higher priority than a thread that is concurrently running on another processor.
当不同优先级的信元在争抢资源时，应该保证优先级高的信元先得到服务，优先级低的信元在缓冲器中等待。
When the cells with different priorities compete for resources, the cells with high priority should be served first, and the cells with low priority should wait in the buffer.
逻辑运算符的优先级低于单独的比较运算符，这一点意义重大，因为必须先计算比较运算符，然后才能计算逻辑运算符。
The logical operators have lower precedence than the individual comparison operators, which makes sense because the comparison has to be evaluated before the logical operator can be evaluated.
转为后台运行的程序照样可以获得系统事件、读写数据、访问系统服务、改变自己的界面，只不过比当前显示在主界面的程序而言，运行优先级低了一点。
Background applications can get events, read and write data, access services, repaint themselves and are generally not restricted other than to run at a lower priority than the foreground application.
转为后台运行的程序照样可以获得系统事件、读写数据、访问系统服务、改变自己的界面，只不过比当前显示在主界面的程序而言，运行优先级低了一点。
Background applications can get events, read and write data, access services, repaint themselves and are generally not restricted other than to run at a lower priority than the foreground application.
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