Object Member Efficiency 对象成员的效率
object member access operator 即对象成员访
member object 成员对象
member class object 成员对象
object level member 对象级成员
The operation becomes either an array item lookup or an object member lookup.
操作转换成一个数组项查询或者一个对象成员查询。
To be more accurate, you should be careful to use object member only when necessary.
更确切地说，你应当小心地，只在必要情况下使用对象成员。
If the spelling is correct and the syntax of any object member access is correct, verify that the element has been declared.
如果拼写是正确的，任何对象成员访问的语法也是正确的，请验证是否声明了该元素。
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