Basic Search allows you to use + and - but you can not use Boolean operators or more complex expressions.
基本搜索允许您使用+和-，但不能使用布尔运算符或更复杂的表达式。
The frequency and order in which small parts may occur in larger parts is specified by operators — mostly the same symbols you see in regular expressions.
由运算符—通常和您在正则表达式中看到的符号相同—来指定小部件在较大的部件中出现的频率和顺序。
You can combine such expressions with Boolean operators (AND, or, NOT).
可以使用布尔操作符(AND, OR, NOT)组合这些表达式(AND, OR, NOT)。
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