cannot be assumed to be justly or naturally enslaved.

不应该认为奴役他们是正义的自然地
Similarly, he denies that

同样的他发对
slavery is always or only appropriate for non-Greeks.

奴隶制总是只适用于外邦人
There are no, he is saying, racial or ethnic characteristics that

他认为没有种族和种族特征
distinguish the natural slave from the natural master.

可以用来区分天生的奴隶和天生的主人
In a stunning admission, he says--listen to this--that

他写到听着
"while nature may intend to distinguish the free man from the slave,"

"自然希望能区分自由人和奴隶
he says, "the opposite often results.

但总是适得其反
Nature often misses the mark," he says.

自然经常出错"
Now we seem to be completely confused.

这导致我们现在彻底困惑了
If slavery is natural,

如果奴隶制有其自然性
and if nature intends to distinguish the slave from the free,

如果是自然使奴隶不再自由