When we know two vectors in a plane, it let us find the normal vector to the plane, and that is what we need to find the equation.
当我们已知平面上的两个向量，我们就可以找到，这个平面的法向量，然后我们就可以用法向量来找到方程。
Often life is a teacher; it let us understand: What is love? What is true happiness? Perhaps everyone's understanding is not the same!
很多时候生活就是一位老师；它让我们领悟：什么是爱?什么是真正的幸福?或许每个人的领悟都不一样！
"Don't let us make it tidy," said Mary anxiously.
“我们别把它弄得太整洁了。”玛丽焦急地说。
If we value something not as a means to something else, but for its own sake, let us say that it has "intrinsic value".
如果我们重视某物不是因为把它看作达成其他目标的手段，而是因为它本身，我们就说它有“内在价值”。
It will let us eliminate the risk we would take of contaminating the samples if they were brought back to Earth.
如果他们被带回地球，会使我们消除可能为样品污染而承担的风险。
It will be dark in fifteen minutes—and then let them follow us if they want to.
十五分钟后就天黑了——如果他们愿意，就让他们跟着我们吧。
Of course, it was an element the periodic table let us to expect existed before anyone had found it or made it.
当然，它在被人发现或制造前，就是一种元素周期表使得我们期待其存在的元素。
In this case, having to then let go of the book after holding it might generate a subtle sense of loss, and motivate us to make the purchase even more.
在这种情况下，拿着书后不得不放手，可能会产生一种微妙的失落感，并促使我们购买更多。
"With all my heart," said Partlet, "let us go and make a holiday of it together."
“全心全意地，”帕特莱特说，“走吧，让我们一起去度假。”
"That is queer, indeed," said the other, "let us follow the cart, and see where it goes."
“这真奇怪。”另一个说，“咱们跟着车子走，看看它要去哪儿。”
My chemistry teacher Mrs. Louise usually gave us the instruction paper the night before the lab class and let us read it.
我的化学老师路易丝夫人通常在实验课的前一天晚上给我们说明书，让我们阅读。
When they were free from work, they invited us to local events and let us know of an interesting competition to watch, together with the story behind it.
他们下班后，邀请我们参加当地活动，让我们了解一个有趣的比赛及其背后的故事。
It is an absolute value which will not let us downbecause (since it does not exist) it is as insulated fromthe winds of history as a phantom.
它是一种绝对价值，不会让我们沉沦（尽管它并不存在），因为它就像幽灵，从未被历史的风吹去。
I hope you found it educational so far, so let us finish by looking into Platform and product offers.
笔者希望您发现它的教育性意义，所以让我们继续下一个章节“平台与产品提供”，完成这一部分的学习。
Let us leave it here, and go our way, seeing that we are poor men, and have children of our own whose bread we may not give to another.
就把他留在这吧，咱们继续走咱们的路。咱们可是穷光蛋，看到没，如果是自己的孩子，那有口吃的都会给他。
Our technology is too stupid right now (or we're too stupid to figure it out) to let us know, in a subtle manner, when something really is important needing our immediate attention.
当下我们的技术实在是相当的愚蠢(或者我们也同样愚笨到没有领会到这点)，竟然以一种微妙的方式让我们知道十分重要的事情是需要关注的。
We think StopTweet is a genuinely useful app, and we recommend that you give it a shot and let us know how it works for you.
我们认为StopT weet确实是很有用的应用程序，并建议读者截图，让我们知道它的效果如何。
I'm sure you've got plenty of views on working hard (whether you strive for it or try to avoid it!) - so let us know your thoughts in the comments...
我确定你对努力工作有很多的观点(不论你是为之而奋斗还是试图避免)，那么让我们知道你的观点和想法吧。
Ok, as John after Kennedy put it, let us never negotiate out of fear, but let us never fear to negotiate.
好吧，就像约翰模仿肯尼迪说的，我们决不要出于害怕而去谈判，而要永远不害怕谈判。
Let us hope it is only the beginning of a worldwide effort to forecast and understand space weather.
我们希望这仅仅是世界范围内预报及了解太空天气行动的的开始。
If we value something not as a means to something else but for its own sake, let us say that it has “intrinsic value”.
如果我们看重一件事但是不把它作为达成另一件事的方式，而是它本身的缘故，这就叫“内在价值”。
After all, if it's going to make our customer happy and it doesn't cost us anything, then maybe this time we can let it go.
毕竟，如果能使我们的客户高兴却不花费我们任何代价，那么可能这次我们就让它这样好了。
If you're not feeling eloquent enough to explain your decision to others, let us say it for you.
如果你感到你没有足够的口才向他人解释你的决定，让我们替你说。
Language is not good enough to describe the charm of volunteerism, so let us praise it with our hearts and souls!
我们甚至无法用语言来描述志愿精神的魅力，就让我们用心灵来讴歌它吧！
They won't let us see most of it. Probably we can only see a couple of rooms.
他们很多地方不会让人参观的，或许只能参观几间展览室而已。
Let us settle it at once: will you stay here, and am I to fight my way to Catherine over Linton and his footmen?
我们马上决定吧：你是要住在这儿，让我去同林惇和他的仆人们打一仗后去看凯瑟琳呢？
Let us settle it at once: will you stay here, and am I to fight my way to Catherine over Linton and his footmen?
我们马上决定吧：你是要住在这儿，让我去同林惇和他的仆人们打一仗后去看凯瑟琳呢？
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