To understand this predisposition for monogamy, he takes readers through the myriad feelings of love, from the heady, breathless exhilaration of falling, to the stubborn persistence of familial affection, to the bitterness of betrayal.

为了理解一夫一妻制偏向，邓巴博士带领读者体味了爱各种感觉，从初坠爱河时忘乎所以，呼吸困难兴奋，到义无反顾地维持家庭关系，再到遭到背叛时心如刀割。

When you love what you love unapologetically, it is beautiful.

当你义无反顾地爱上你所爱事务时，它就是美丽。

What's sad is how many people go ahead and have kids anyway.

但可悲是仍有很多义无反顾要了孩子。

You were giving it all up for love.

你当时为了爱义无反顾地放弃了一切。

That's why we say jump in with both feet.

这就是为什么我们说全力以赴，义无反顾。

But whereas we can move in any direction in those other three dimensions we can only move in one direction of time — forward, relentlessly.

但是，虽然我们可以在其他三个维度上向任何方向移动，可我们只能朝着时间一个方向移动——义无反顾地向前。

What’s needed now is a targeted, relentless counterterrorism campaign against ISIL that combines American air power, contributions from allies and partners, and more support to forces that are fighting these terrorists on the ground.

目前我们需要是一种目标明确，义无反顾反恐行动方案，综合利用美国空中力量和盟友支持，加大对地面反恐行动支援，以此来打击ISIL。

But no one doubt we will run out there and fight for the city not only because we are the greatest teammates around us, but also we have great fans here.

但是没有会怀疑我们是否会为了胜利义无反顾，因为我们不仅有最优秀球员，还有伟大粉丝支持我们。

You understand? Y-You show me a train, I'll jump in front of it for her, no question. And she's not even mine.

你明白吗？如果一辆火车驶来，我会义无反顾地为她挡在前面。她甚至都不是我亲生。

And we are determined to boost our efforts in a more determined and more persistent way.”

我们将义无反顾，我们努力将会更坚定，更持久。”

When salmon are ready to spawn, they make a one-way trip from the ocean up into streams to lay their eggs.

每到产卵季节，鲑鱼就会“义无反顾”从海洋游到河里产卵。

I would throw myself off a cliff and go all the way to follow what my heart tells me.

我愿意奋不顾身，义无反顾地追随我内心。

But we're swinging for the fences.

但我们义无反顾。

So now he's gone from being hesitant to being on a crusade.

所以现在他从犹豫不决变成了义无反顾。

And I haven't really turned back since.

自那以后，我便义无反顾。

It's not the kind of squad I would want to join, but these 12 young men did it, and every weekthey were tested to see if they were healthy or were becoming sick from the food they were eating.

这不是我想加入那种队伍，但这12个年轻却义无反顾地参与其中，每周都会对他们进行健康检查， 以观察他们是否健康， 还是因所食用食物而开始生病。

Fru Lensmand Heyerdahl had taken up the case. She went about to high and low, never sparing herself, demanded to be called as a witness, and made a speech in court.

Fru Lensmand Heyerdahl 接手了这个案子。她颠沛流离，义无反顾，要求出庭作证，并在法庭上发言。

And the engineers will often dutifully, they will salute the designer and march off the cliff to make what needs to happen happen, even though it'll take weeks.

工程师们通常会忠实地执行，他们会向设计师敬礼， 然后义无反顾地投入工作，即使这意味着需要花费数周时间来实现所需功能。

And they'll do it even if they know it's suicidal, and they'll do it even if they know it will contribute to victory, not one iota.

即使明知此举是自取灭亡，他们也会义无反顾； 即便清楚这丝毫无助于胜利，他们依然会勇往直前。

And so it just took me a little bit longer to get there, but Mandy kind of pulled me over and I've never looked back.

所以， 我花了稍长一点时间才走到这一步，但曼迪把我拉了过来， 从此我便义无反顾。