Since 1914, scientists have known that birds flying in formation—a V-shape—expend less energy.
自1914年以来，科学家们已经知道，以V字形队形飞行的鸟类消耗的能量更少。
If the boy had destroyed any of his Horcruxes, he, Lord Voldemort, would have known, would have felt it?
如果那男孩销毁了他的某个魂器，他，伏地魔，肯定会知道，肯定会感觉到吧？
Many students at his university would have known his name, but they could all identify him by his signature.
他学校中的很多学生本来是知道他的名字的，但他们都只能从他的签名认出他。
For thousands of years, people have known that the best way to understand a concept is to explain it to someone else.
几千年来，人们都知道，理解一个概念的最好方法就是向别人解释它。
I have known cases where dogs have nipped babies.
我知道一些狗咬婴儿的事例。
He bombarded Catherine with questions to which he should have known the answers.
他不停地追问凯瑟琳他本该知道答案的问题。
I should have known the answer to his simple question.
我本应该知道他那个简单问题的答案的。
Without chemistry, we would never have known that we need soap to get the oil out of clothes.
如果没有化学，我们永远不会知道我们需要肥皂来去除衣服上的油污。
So far, I've completely got used to the life here and have known a lot about traditional Chinese culture.
到目前为止，我已经完全适应了这里的生活，也了解了很多中国传统文化。
He seems to have known something about the modern economic theory of society long before modern economics was even developed.
他似乎早在现代经济学发展之前就对现代社会经济理论有所了解。
Since Bernie Madoff's arrest on charges of running a $65 million Ponzi scheme, I've read many articles about how we investors should have known what was going on.
自从伯尼·麦道夫因涉嫌经营6500万美元的庞氏骗局而被捕以来，我读过很多文章，说我们这些投资者应该知道发生了什么。
Paleontologists have known for decades about the beginnings and endings of a group of dinosaurs known as the Sauropodomorpha.
几十年来，古生物学家们已经知道了一群被称为蜥脚类动物的恐龙的起源和结局。
But we wouldn't have known that.
但我们无法未卜先知。
Joseph seems to have known that.
约瑟知道这个。
They seems to have known the answers.
他们好像知道了答案。
I have known the family, he notes, for 24 years.
他说，他认识这家人已经24年了。
Even his closest colleagues appeared not to have known about it.
即便是他的亲信都对此一无所知。
It crossed my mind that if he hadn't died, I might never have known.
我想到，如果他没有死，也许我永远都不会知道。
We have known a grandmother who succeeded in turning Theodore into Gnon.
我们认得一个人的祖母，她居然把泰奥多尔变成了格农。
Researchers have known for years that their models of reality are incomplete.
研究人员很多年前就知道实体模型是不完善的。
That's how I came up with that number 160, otherwise I wouldn't have known.
这就是我如何计算出,数字160的，要不然，是不会知道的。
Americans have known all this for a while, but Europeans are learning it fast.
美国人谙熟此道已有一段时间，而欧洲人学得也很快。
Samantha, if not for today, not for you ...I would never have known love at all.
莎曼塔，要不是今天，要不是你……我永远不会懂得爱情。
We have known for ages that, as standards of living improve, health gets better.
我们早已知道，随着生活水准的提高，人们越来越健康。
Scientists have known for more than two decades that cancer is a disease of the genes.
二十多年前科学家就已经知道癌症是一种基因病变。
Practicing neuroscientists have known for years that reverse inference is a fallacy.
专业的神经科学家早就知道反向推理是谬论。
We have known at least since the '60s that this kind of self-touch actually reduces pain.
这种触摸自己能减轻疼痛感的道理至少在60年代就已为人所知。
We have known at least since the '60s that this kind of self-touch actually reduces pain.
这种触摸自己能减轻疼痛感的道理至少在60年代就已为人所知。
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