实际上，策略表达式只是使用一个尖括号格式的逻辑表达式，断言是子句。
Policy expressions really are just logic expressions using a pointy-bracket format, with assertions as clauses.
实际上，策略表达式只是使用一个尖括号格式的逻辑表达式，断言是子句。
Policy expressions really are just logic expressions using a pointy - bracket format, with assertions as clauses.
如果有怀疑，则在表达式上按程序逻辑要求使用圆括号强制操作数的组合。
When in doubt, parenthesize expressions to force the grouping that the logic of your program requires.
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