When doing conditional branching, passing values to functions, returning a value from a function, and several other scenarios, the value in the preferred slot is the one that matters.
当进行条件分支、向函数传递值、从函数返回值以及其他操作时，首选槽内的值才是关键的。
When doing conditional branching, passing values to functions, returning a value from a function, and several other scenarios, the value in the preferred slot is the one that matters.
当进行条件分支、向函数传递值、从函数返回值以及其他操作时，首选槽内的值才是关键的。
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