This custom dates from the time when human wore swords.
这项习俗始于人类佩戴刀剑的时代。
"We know, without a shadow of a doubt, when human life begins," he says.
“我们明确地知道，人的生命从何时开始，”他说。
There was no family when human beings split up from the animal world.
当人类从动物分化出来之初，并无家庭。
Why would he do what he has done, when human logic dictates otherwise?
他为何如此行呢？为何与人的逻辑背道而驰呢？
Moreover, in the modern age when human beings depend so much on machines.
此外，在当今这个人类如此依赖机器的时代。
When human hearts are injured, as during heart attacks, healthy tissue normally can't re-grow.
当人的心脏受损，如心脏病发作，健康组织通常不会再生。
He's really very human when you get to know him.
你若了解他，就知道他确实很有人情味。
When it grows hot, heat can affect human health.
天气变热时，高温会影响人体健康。
When processing the human task, the manager will either approve or disapprove the order.
在处理人工任务时，经理或者批准订单或者不批准订单。
When demand picked up, valuable human capital had left the market forever.
当需求回升，宝贵的人力资本却已经永远离开了市场。
But our bodies are human, too, and they do best when they're loved.
但是，我们的身体也是人，他们高兴时才会竭尽全力。
Simply put, when we treat people as human resources, we begin to dehumanize the job.
简单地说，当我们把职员看作是人力资源时，我们就会使工作失掉人性化。
If you get to know people, they think of a real human being when they write those stories, and they care a little more.
不过如果你开始结识一些人，他们会在写报道的时候想到这个他们认识的“真人”，然后就会更加谨慎地对待他们所写的东西。
A human task activity is used when work is to be performed by a person.
当工作需要由某个人执行时，可以使用人工任务活动。
Normally they hide during the day and become active at night when they feed on human blood.
它们通常在日间隐藏起来，到晚上就出来活动，吸食人的血液。
When customers come in contact with employees, those human encounters make a huge difference.
当消费者与雇员进行接触的时候，这种人与人之间的邂逅往往有着巨大的差异。
And they are human - the finest people in the world when the sun shines!
太阳普照时，他们就是人，天下最好的人！
The problem arises when drugs used for food production are medically important for human health.
当食品生产过程中，所使用的药物从医学角度而言对人类健康很重要时，这一问题就出现了。
I certainly don't think about it when I operate on the human brain.
我在做脑科手术时当然不会想到这个问题。
It is a human need when you feel something inside to express it outwardly.
想把内心感受表达出来是人的需要。
Certainly, I thought, the human spirit can't be in error when it is non-existent.
当然，我认为，人类的精神在它还是非存在的时候是不可能犯错的。
But this trend has its own logic: human beings reproduce when they are healthy.
但是，这种趋势有其内在逻辑：人类健康了，才会生育。
Remember in part one when I said human beings are self-centered by nature.
还记得在第一部分中我提到过人性天生就是以自我为中心的吗。
Certainly when I first came across it, my view of human nature was changed irrevocably.
当然在我第一次听说它的时候，我对于人性的看法被无法撤回地改变了。
Trust that the human race thrives when empowered to make decisions.
当人们被赋予做决定的权力时，他们会竭尽全力。
Viruses can also cause genetic mutations when they integrate themselves into human DNA.
病毒整合进人类DNA时也会导致基因突变。
When you have anger toward another human being, give this a try.
当你对别人心生愤怒时，试试这个办法。
It’s human nature to try to survive when put under pressure.
人们在面对压力时会很自然地选择保存自己，这是人类的天性。
It’s human nature to try to survive when put under pressure.
人们在面对压力时会很自然地选择保存自己，这是人类的天性。
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