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I want to now move down a little bit and observe how landscape is presented to us.
现在我想往下看一点,观察一下四周场景,是怎样的呈现给我们的。
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You just got to be looking around all the time to make sure you are not going to be run down.
你随时观察四周以确保你不会被撞倒。
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The tabernacle always moves in the center of the tribes, and they're positioned in certain specific positions around the tabernacle as they move.
放置约柜的帐幕经常在部落的中心移动，人们一般随着帐幕的移动,在四周搭建帐篷。
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We'll talk about cell culture engineering during Week 4, how do you maintain cells in culture, what are the limits of this.
第四周我们会探讨细胞培养工程,人们如何在培养基中维持细胞的存活,这种方法的局限性是什么
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And it's about my third or fourth week of graduate school and I'm pretty nervous about this.
那时，研究生学习才开始三到四周,我很紧张。
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We always have to look around us and account for all the evidence.
我们总是四周观察,并对所有证据都作出解释。
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This is the end of week four.
这个第四周最后一次课。
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All right. So suppose that I woke up this morning, that is to say, at a certain point I look around my room and I see the familiar sights of my darkened bedroom.
假定我早上醒来,也就是说,我在某个位置上,环顾房间四周,看到了昏暗的卧室里熟悉的场景
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The first three or four weeks or so we'll be following the elements of music: rhythm, melody and harmony-- and then a test.
开始的三或四周,我们会逐个介绍,音乐中的元素,节奏,旋律,和声,然后有一个考试
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So you'll just got like to look around and after a couple of times you come here,
你得四周看看，多转几次，
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The reason it looks like a tautology, because you look around, nothing seems to have its velocity forever.
其原因听起来像是绕圈子,因为你看看四周,似乎一切都不可能永远运动下去
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It's quiet, it's warm, Now imagine you're born deaf, you cannot hear, you cannot communicate by spoken words with your friends and family.
四周一片寂静，温暖，再来假设你自幼失聪，不能和家人，朋友用语言交流。
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And then you look around and you'll say "Where is the babysitter or the parents?"
你看了看四周，可能会说,“这孩子的保姆或父母呢？“
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It might well be that the people who won those wars,internal wars, would have been glad to send them away rather than to have these discontented people and these folks who were their enemies hanging around town and making trouble.
很可能,赢得这些战争和内战的人,比起留下这些不满的民众,让敌人在四周游窜制造麻烦,更愿意打发他们离开
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you can see as you look around, is a poorer class of people that's here.
环顾四周，你会发现，居住在这里的人都是社会中比较贫困的阶层。
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even though it is the holiday season. Just seeing little twinkling lights around
即使是圣诞季。仅仅看着四周摇曳的微光，
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The clouds are really dark and it's getting quiet around the time,
乌云密布，四周都是暴风雨前的宁静。
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and then they will move over and do four weeks somewhere else.
然后他们会搬走，在其他地方做四周。
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We accept that you look around the world and you get sensations and you figure out there is a car, there is a tree, there is a person.
当我们环顾四周，便会产生感知觉,明白这是一辆车，那是一棵树，那边有一个人。
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I look around and the Morning Star is not there.
我四周张望,没有看到晨星
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Alright, welcome back to CS50, this is the start of week 4.
欢迎来到CS50学堂，这是第四周的课程。
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And so what we ended up doing is the last four weeks of class after we had grounded it in the history of the modern university, understood the structure of it, we had the students select topics that they were really interested in.
所以我们最后选择,在最后四周，在我们了解了,现代大学的历史，理解大学的结构之后，我们让学生们选择一些,他们真正感兴趣的话题。
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