If you must move, don't follow a stream unless you know it, and in that case, you are not lost.
如果你非要走动的话，别顺着溪流走，除非你对它很熟悉。但是如果你很熟悉，那你就不会迷路了。
We do not even know, for example, how many stars have planets, and we certainly do not know how likely it is that life will arise naturally, given the right conditions.
例如，我们甚至不知道有多少恒星有行星，我们当然也不知道如果有适当的条件，生命自然出现的可能性有多大。
What you may not know is that the Titanic wasn't even the flagship of this class.
你可能不知道的是，泰坦尼克号甚至不是这一类的旗舰。
So the analysis you do might not throw up anything that people didn't know before.
所以你做的分析可能总结不出人们之前不知道的事情。
You'd better not make remarks about things that you don't know at all.
对于你不了解的事情，你最好不要发表评论。
Right well I know where it lies; but it was not I that put it there--first.
好吧，我知道它在哪里；但起先不是我把它放在那儿的。
I'm not sure how we'll reach that better place beyond the horizon, but I know we'll get there.
我不确定我们怎么到达地平线之外更加美好的地方，但是我们知道我们将会到达那里。
"Your granddaddy don't care for 'em, neither," he threw in. "Not that I know of, leastways."
"你的祖父对他们都不喜欢，"他插话说。 "至少，据我所知不是。"
"That is all very well," said he, "but still I do not know what it is to shudder!"
“这很好，”他说，“但我还是不知道害怕是怎么回事！”
Each time you replicated that song, and maybe passed it along to someone who did not know it yet, a small child maybe.
每一次你复制那首歌，可能就把它传给了一个不知道这首歌的人，也许是一个小孩子。
He did not know that Dr. Craven would have said that his nerves had relaxed and rested themselves.
他不知道，克雷文医生肯定会说：他的神经得到休息，已经舒缓下来。
Moreover, there are processes that influence climate, such as modifications in land use, that scientists do not know how to simulate.
此外，还有一些影响气候的过程，如科学家们不知道如何模拟的土地利用的变化。
We need to know the custom of this country, so that we would not displease anyone.
我们要了解这个国家的习俗，这样我们就不会激怒别人了。
However, not all the people know that noise is also a kind of pollution, and that is harmful to human health, too.
然而，并不是所有的人都知道噪音也是一种污染，对人类健康也是有害的。
He understood by a sort of instinct so natural that he did not know it was understanding.
他的理解是出于一种本能，这种本能如此自然，以致于他不知道那是一种理解。
It does not necessarily follow that if you know few of your neighbors you will know no one else.
如果你认识的邻居很少，这并不一定意味着你不认识其他任何人。
It wasn't just poking fun at Sally, but the whole idea that our school is sort of rural, and you know, not cosmopolitan.
这不仅仅是在取笑莎莉，而是在说我们学校位置比较偏僻，不是在什么世界性的大都市。
It was okay! Now that I know about all the good things ants do, I m not so afraid of them anymore.
这是好的！现在我知道了蚂蚁做的所有好事，我不再那么害怕它们了。
However, you may not know that he also holds a master's degree in criminology and studied abroad for a year with the international police force which deals with crimes around the world.
但是，你可能不知道他还拥有犯罪学硕士学位，并在国际警察部队出国学习了一年，该部队负责处理世界各地的犯罪活动。
We just know that his ways are not our ways, but his ways are always best.
我们只知道他的方法不是我们的方法，但他的方法总是最好的。
No one will believe those promises because they know that later it will not be in your interest to deliver those promises.
没人会相信那些承诺，因为他们了解，以后履行这些承诺不会符合你的利益。
You know that studying six consecutive hours is not equivalent to studying one hour a day for six days.
你知道连续学习6个小时并不等于连续6天每天学习1个小时。
We all know that it's not healthy to have meals in fast-food restaurant like McDonald's frequently.
我们都知道经常去快餐店比如说麦当劳吃饭是不健康的。
We all know that it's not healthy to have meals in fast-food restaurant like McDonald's frequently.
我们都知道经常去快餐店比如说麦当劳吃饭是不健康的。
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