They're the only moral agents for me.

他们是我唯一的道德主体。

We shall not, as at present, doubt whether she is a moral agent, or the link which unites man with brutes.

我们不会像现在一样怀疑她是一个道德主体，还是将人与动物结合在一起的纽带。

We would generally not view a dog as a moral agent, and  thus, we would not deem a violent dog as immoral.

我们通常不会将狗视为道德主体，因此，我们不会认为暴力的狗是不道德的。

To be clear,   a moral agent here refers to an individual who has the ability to think in terms of right  and wrong and can decide to act accordingly.

需要明确的是，这里的道德主体是指具有正确和错误思维能力并能决定采取相应行动的个体。