Fortunately, volunteers are not motivated by self-interest, but by altruism.

幸运的是，志愿者们不是被自身利益而是被利他主义推动。

Some even act out of sheer altruism.

有些行为甚至完全是利他的。

I don't think altruism is boring.

我不认为奉献是无聊的。

Altruism is the opposite of selfishness.

忘我主义的反面是自私自利。

It actually can help us explain altruism.

这的确可帮我们解释利他主义。

But he acknowledges it is not pure altruism.

但他承认，这并非基于纯粹的利他主义。

Altruism is another big draw to the company garden.

利他主义是公司菜园的另一大收获。

We'd get about as much altruism from an ant colony.

我们能从一群蚂蚁身上得到同样的利他主义。

And then we'll move towards altruism, towards non kin.

然后我会讲对非亲人的利他主义。

So, it seems, altruism is simply self-interest of a subtle kind.

所以，貌似利他主义不过是一种微妙的利已主义罢了。

Altruism and family values also influenced long-term happiness.

无私和家庭价值也能影响长期的幸福。

Life is limited, but true friendship and altruism last forever.

人的生命是有限的，但纯真的友谊和无私的精神则是永恒的。

Hippies preach altruism and mysticism, honesty, joy and nonviolence.

嬉皮士宣扬利他主义和神秘主义，诚实、喜悦与非暴力。

Reciprocal altruism and kin selection are the two main theories.

互利主义和亲族选择是两个主要理论。

Meanwhile, other ACTS of seeming altruism are often just reciprocity.

与此同时，其他一些表面上看来的利他主义行为往往也仅仅是互惠。

"Altruism makes people calmer and more fulfilled," Biddulph says.

“无私让人们更加平和、充实，” Biddulph说。

Examples of altruism abound, both among humans and among other mammals.

忘我主义的例子俯拾皆是，广泛存在于人类和其它哺乳动物群体中。

Unsurprisingly, with altruism the only incentive, not enough people offer.

由于利他主义是捐肾者唯一的动机，也就难怪没有足够多的人来捐献了。

Contemporary discussions of altruism quickly turn to evolutionary explanations.

当代有关利他主义的讨论迅速转向生物进化的解释。

But neither theory fully accounts for our ordinary understanding of altruism.

但两种理论均未就我们对利他主义的一般理解加以解释。

It is not just altruism: greener engines also use less fuel, and so cut costs.

这并不完全出自于全心全意的奉献精神：环保型引擎也需要更少的燃料，从而降低成本。

Still, doubting altruism is easy, even when it seems at first glance to be apparent.

尽管如此，质疑利他主义还是很容易，即便它一目了然。

But what exactly is the moral relevance of empathy and altruism in non-human animals?

而对非人类的动物而言，这种移情作用和利他主义的道德相关性究竟何在呢？

It is not just altruism: greener engines also use less fuel, so boost profit margins.

这并非只是利他之举：更绿色的引擎会使用更少的燃料以增加利润率。

If AIDS is defeated, it will be thanks to an alliance of science, activism and altruism.

如果艾滋病被攻克，这将归功于科学，行动主义和利他主义三者的结合。

The second form is reciprocal altruism, or “you scratch my back and I'll scratch yours”.

另一种形式则是互惠型的利他行为，或称为“狼狈为奸，唯利是图”。