We heard some defenses of what they did.

先说说几种为他们辩护的
The defenses had to do with necessity, their dire circumstance,

有人说他们在那样的处境下不得已而为之
and, implicitly at least, the idea that numbers matter.

并且暗含了"人数重要"的理念
And not only numbers matter but the wider effects matter;

不仅人数重要更广泛的影响也很重要
their families back home, their dependents.

他们在国内有家庭有亲人
Parker was an orphan, no one would miss him.

而派克只是个孤儿没人会想念他
So if you add up,

合计来看的话
if you try to calculate the balance of happiness and suffering,

计算一下幸福与痛苦之差
you might have a case for saying what they did was the right thing.

你也许会认为他们的所作所为是正确的选择
Then we heard at least three different types of objections.

然后我们至少听到了三种反对意见
We heard an objection that said

其中之一是说
what they did was categorically wrong,

他们的所作所为是绝对错误的