The parentheses indicate to the Rhino interpreter that I'm invoking a function rather than simply referring to a property of the object.

圆括号告诉 Rhino 解释器我正在调用一个函数，而不是简单地引用一个对象的属性。

youdao

There is a big difference between configuring and invoking a function. The former may include the latter, but the latter shouldn't include the former.

设置和启动一个功能之间差别巨大，前者也许包含后者，然而后者不应该包含前者。

youdao

For example, a variable could be set by invoking a function that supplies the value of the SESSION_USER special register to fetch the department number for the current user.

例如，通过调用一个可以为SESSION_USER特殊寄存器提供值的函数来设置变量，使用它取回当前用户的部门编号。

youdao