Another common expression is to get the hang of something. It means to understand how a device works or how to do a job.
另一种普通的表述就是熟悉某物的用法，意思是说怎么明白一个设备的运行或怎么做好一项工作。
Another common expression, "to hold water," is about the strength or weakness of an idea or opinion that you may be arguing about.
另一个常见的表达是toholdwater(站得住脚；合情合理)，事关一个想法、观点或论点有力与否。
Derive is written in Lisp, a common programming language that is especially suited for the kind of rule-based processing necessary for transforming one abstract mathematical expression into another.
Derive是使用Lisp语言编写的，Lisp是一种公共编程语言，尤其适合基于规则的处理，该处理是将一个抽象数学表达式变换为另一个表达式所必需的。
Predicate is another common form of query expression that evaluates to either true or false.
Predicate是计算结果为true或false的常见查询表达式形式。
Predicate is another common form of query expression that evaluates to either true or false.
Predicate是计算结果为true或false的常见查询表达式形式。
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