它调用操作符的一个基类的衍生工具的集合。
It invokes operator on a collection of derivatives of the base class.
调用操作符是一对圆括号，括住传递给函数的实参列表（可能为空）。
The call operator is a pair of parentheses that encloses a (possibly empty) list of arguments that we pass to the function.
执行成员函数和执行其他函数相似：要调用函数，可将调用操作符（（））放在函数名之后。
We execute a member function in much the same way as we do any function: To call a function, we follow the function name by the call operator (the "()" operator).
表2列出了用来从perl脚本中调用系统命令的Perl核心函数和操作符。
Table 2 lists Perl core functions and operators leveraged to call system commands from within a Perl script.
因此，要判断某个值是否是dictionary中的键，应该使用in操作符检查这个值是否在调用keys方法所返回的键值列表中。
Therefore, to determine if a value is a key within a dictionary, you use the in operator to test whether the key is in the list of key values returned by calling the keys method.
当调用new操作符时，构造函数就为对象创建一个所谓的原型（prototype）；也就是说，它创建了一个 模板（template），从中构建给定类型的对象。
When invoked with the new operator, the constructor function creates what is known as a prototype for an object; that is, it creates a template from which to build objects of the given kind.
summarize方法是通过Dictionary实例使用对象操作符调用的。
The summarize method is invoked via a Dictionary instance using the object operator.
通过backtick 操作符，我们断定它调用一个管道系统命令（prtconf |grepMemory），而 prtconf 命令是特定于 Solaris 的。
We figure out that it calls a piped system command (prtconf | grep Memory) through the backtick operator, and the prtconf command is specific to Solaris.
它们通常(但不总是)通过对象实例使用对象操作符来调用的。
They are usually — but not always — called via an object instance using the object operator.
并且我们看到如何指定以在全局空间内调用方法：只需使用名称空间操作符作为调用的前缀。
And we see how to specify that we wish to call the method in the global scope by just prefacing the call with the namespace operator.
RPD操作符中的远程访问计划是由包装器构造的，其中包含为调用来自非关系数据源的远程请求所需的规范。
The remote access plan contained in the RPD operator is constructed by the wrapper and contains the necessary specification to invoke the remote request from the non-relational data source.
表达式由数据结构、绑定的变量（即具有值的变量）、数学操作符和函数调用组成。
The expression is composed of data structures, bound variables (that is, those with a value), mathematical operations and function calls.
Groovy中强大的as操作符接收一个代码块并生成一个新类来实现该接口，您可以像调用实现该接口的具体类一样调用它。
The powerful as operator in Groovy takes a code block and generates a new class that implements the interface, which you can then call as if it were a concrete class implementing the interface.
通常使用成员函数作为点操作符的右操作数来调用成员函数。
When we use a member function as the right-hand operand of the dot operator, we usually do so to call that function.
当我返回值赋值操作符，首先是调用复制构造函数为基础的机制？
When I return by value from an assignment operator, firstly what is the mechanism and basis of calling the copy constructor?
无论何时编 译器见到这样一个操作符，它只是用合适的函数调用来替换它。
Whenever the compiler sees such an operator, it simply replaces it with the appropriate function call.
当调用成员函数时，（通常）指定函数要操作的对象。语法是使用点操作符（。）
When we call a member function, we (usually) specify the object on which the function will operate. This syntax uses the dot operator (the ". " operator)
当调用成员函数时，（通常）指定函数要操作的对象。语法是使用点操作符（。）
When we call a member function, we (usually) specify the object on which the function will operate. This syntax uses the dot operator (the ". " operator)
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