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And if the distance between the wall and the dam was large in comparison to the wavelength then what happens?
如果水槽壁,和屏障之间的距离,大于波长,会导致什么？
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Satan's shield is as big as the moon -this is the most common form of simile, epic or otherwise, and it can be schematized.
他的屏障如同月亮一般庞大,-这是最常见的比喻形式，并且还可以再用图表概要化。
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When d is large in comparison to lambda the obstacles cast shadows.
当距离大于λ,屏障也会投下阴影。
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This cell can only be an effective barrier if there's no way to get past it.
这些细胞只有密不透风,才足以形成一道屏障
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A state of war can include, in other words, " what we might call a "cold war," two hostile sides looking at each other across a barrier of some type, not clear or not certain what the other will do.
换句话说，战争状态包括，我们所说的“冷战“,敌对双方透过某种屏障,对对方虎视眈眈，却不知道对方会干什么。
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It has nothing whatsoever to do with the question of simply the size of Satan's shield, and we realize that we have to redraw the schema into which we fit this simile.
实际上这和撒旦屏障的大小,并无实际的关联，我们得重新规划屏障的大小,来适应这个比喻。
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As I see it, the official function of this simile is to give us a sense of the size of Satan's shield and thereby to give us a sense of the size of Satan himself.
在我看来，这个比喻的正式的作用,是要给我们展现出撒旦的屏障的规模,因此来展现撒旦自身的伟岸。
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That kind of makes sense, but there's more, of course, here than the moon to describe Satan's shield.
这能说得通了，但是除此之外，还有比月亮更适合的类比撒旦的屏障的东西。
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If this distance is large in comparison to the wavelength, this dam simply casts a shadow.
如果这个距离,比波长更长，水槽中的屏障就会投下阴影。
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For example, you could put a dam in the middle of the tank.
举个例子,在水槽中间放个屏障。
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Well, I'm going to write on the board, "shield equals moon," and you can schematize it with, let's say, "A equals A'." A'?
我会在黑板上写下“屏障和月亮一般大“,你们可以在脑海里概括一下，“两者相等“？
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Now, this particular simile conjures for us an image of someone trying to get a fix on Satan's shield, and there's the suggestion here of an attempt to get a proper perspective on this huge character, Satan.
这个特别的比喻如同戏法般,像我们展示了一个想要对撒旦的屏障有所一瞥的形象，这里有找出对这个重要的人物，撒旦,的一个合理的观点的暗示。
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Some form what are called megakaryocytes which become platelets, which are responsible for clotting, for forming a barrier if your circulatory system gets injured so you don't bleed.
还有一些类型的细胞称为巨核细胞,生成有凝血作用的血小板,在你的循环系统受损时形成止血屏障
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That's how big Satan's shield was: well, how big is Satan's spear?
这是撒旦的屏障的庞大：,那么，撒旦的矛又有多大呢？
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Because of that they're barriers, they separate the inside of the cell from the outside of a cell, and only certain kinds of molecules can pass through a cell membrane.
因为它们的屏障作用,将细胞内外区隔开来,只有特定的,某些分子才能穿过细胞膜
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You have an obstacle.
和屏障。
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The other is that this kind of adherence gives the tissue a property that's useful, in this case the property is it can serve as a barrier to nutrients from entering our body.
另外这种黏附,给予组织一种非常有用的属性,这种属性表现为组织成为,营养物质进入身体过程中的屏障
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These junctions, these red dots here are actually made up of proteins, some are synthesized by one cell, some are synthesized by each other, and they lock together to form a very tight barrier, to form a tight junction between the two cells.
这些红点表示细胞连接,实际上是由蛋白质构成的,有些是由一个细胞单独生成的,有些是由两个细胞共同生成,使这两个细胞紧锁在一起形成紧密的屏障,并在两细胞间形成紧密连接
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We talked about this a little bit in section last week, when you eat vegetables or meat, you're eating a lot of DNA but that doesn't enter the cells of your body because of the barrier properties of cell membranes.
这个我们上周讨论会讲过一些,我们在吃蔬菜或者肉类时,摄入了大量DNA,它们之所以不会进入你的体细胞,就是由于细胞膜的这种屏障作用
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