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。

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？

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.

因此，出于好玩，她把班上的同学按性别分成两个组，然后请他们决定计算机到底是阴性的还是阳性的。