The object (target noun or subject) is $target, which is of class Employee.
对象(目标名词或者主题)是 $target,属于类 Employee。
2
There's a great litmus test: can you, in one short, clear noun phrase, describe what an instance of the class represents?
这儿有一个很好的检验方法:你能否用一个简短的、明了的名词短语描述这个类的实例所代表的东西?
3
So for fun she split the class into two groups, appropriately enough by gender, and asked them to decide whether "computer" should be a masculine or feminine noun.