有什么不同寿命的复合类型和标量类型?。
What is the difference of lifetimes of compound types and scalar types?
可在可用于数据规则的所有测试及函数执行类型的概述部分，找到哪些测试及函数是标量的以及哪些是柱状的。
You will find an overview of which tests and functions are scalar and columnar in the overview of the execution types of all tests and functions available for data rules.
可以使用初始化器列表对标量变量进行初始化，在这种情况下应用一般的类型窄化规则。
It's okay to use initializer lists to initialize scalar variables, and the usual rule of type narrowing applies in such cases.
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