To access derived data types, you use the copy_userdata function, which copies the required data from a non-vue variable, that is, from memory pointed by an argument to a vue script variable.

要想访问派生的数据类型，应该使用copy_userdata函数，它把所需的数据从非vue变量(也就是从参数指向的内存)复制到Vue脚本变量。

youdao

This binds each variable to a particular data type, and the variable can store only data of that type.

这样就将每个变量与特定的数据类型绑定在一起，该变量只能存储那种类型的数据。

youdao

Because the name of a variable describes both the use of a variable and its data type, you are much less likely to make coding errors involving mismatched data types.

因为变量的名字既描述了变量的用途又描述了其数据类型，这样你就不太可能出数据类型匹配上的编码错误。

youdao

All that's going to change, is the value the variable or the value of some data structures.

或者一些数据结构的值,提醒大家在这块代码里面。

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