操作体 meaning in English

action body

Operator , however the body of an operation is not
操作符便可被增量地求值，但操作体则做不到。
Inside the body you can use any of the statements available inside the body of an operation
在代码体中你可以使用任何在操作体中有效的语句。
Unlike java methods , the bodies all javafx member operations and member functions are defined outside of the class declaration , for example , like this
和java方法不同，所有的javafx成员操作体和成员函数体都被定义在类声明外部，例如：
Parameter and return types are required in the declaration of operations and functions in the class declaration but may be omitted in their definitions
在类声明中对操作和函数的声明都需要对参数和返回值类型进行声明，而在操作体和函数体的具体定义中则可被忽略。