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Space scientists have collected a wealth of information from spacecraft that have orbited,landed on and dug into the Martian surface.
VOA: special.2010.07.28
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We talked about host cells that are perhaps infected with a virus, displaying pieces of that virus, antigenic pieces of that virus in the context of a surface receptor called MHC-1, presenting that.
我们说到过,可能受到病毒感染的宿主细胞,表现出病毒的一部分特征,病毒的抗原部分,其表面受体称为主要组织相容性抗原-1,MHC-1负责呈递抗原
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The magnet creates a field which changes the polarity of a tiny, tiny portion of the metal particles which coat each platter's surface.
这个磁体创建一个,能改变覆盖在,磁盘表面小金属粒子的磁极。
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They can develop as flat, discolored areas of skin or as raised growths, often with a rough surface.
VOA: special.2010.07.06
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So, for example, we were talking about a threshold frequency as in a minimum frequency of light that you need in order to eject an electron from a metal surface.
举个例子来说，我们谈论的临界频率是,光从金属表面逐出一个电子,所需的最小频率。
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It is a small device that you move around on a flat surface in front of a computer.
VOA: special.2010.08.01
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When you're falling to the surface of the Earth, you are describing a problem of constant acceleration.
当你讨论下落问题时,你在描述一个加速度恒定的问题
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Embroidery work involves using colored yarn and a needle to create designs on the surface of cloth.
VOA: special.2009.11.04
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The reason you have to get it out of your head is you need to be able to see it on a surface that is not in your mind.
这么做的原因是,你需要,客观地观察它,而不是看它在你大脑中的样子。
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The artist draws an image with oily ink onto a piece of stone or other flat surface.
VOA: special.2009.09.02
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This surface layer thickens at an early stage in a mouse after 8 days of development.
发育8天后，老鼠早期胚胎的,外胚层开始增厚。
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In it,he developed a theory that intelligent life had created waterways all over the surface of Mars.
VOA: special.2010.07.11
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The kinds of proteins that sit on a cell surface and form adhesion junctions with neighboring cells, that's one class of cells on the surface.
这些蛋白位于细胞表面,和相邻的细胞建立粘附链接,这是细胞的一个种类
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It shows two ducks that have just been shot by a hunter as they fly above the surface of a wide expanse of water.
VOA: special.2010.07.25
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is very close to its surface a kind of anal-phase parable.
和那种肛门期的寓言很像。
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With such a vehicle, astronauts could explore a much larger area of the moon's surface.
VOA: special.2009.07.29
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The surface of the Republic reveals that it is a dialogue.
理想国》的表面展现出,这是一场对话。
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There also many different ways to change the appearance of the surface of a textile.
VOA: special.2009.11.04
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So, one difference between photoelectron spectroscopy and, for example, the photoelectric effect is that in this case, we're not just looking at one energy level, which is what we were looking at from the surface of a metal, now we're talking about this gaseous atom.
光电子能谱与光电效应的不同点在于，以这种情况为例，我们不只关心一个能级，就像原来在金属表面那样，现在我们研究的是气体原子，所以，我们可以从原子中。
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A frieze is a long stretch of surface that has been painted or sculpted.
VOA: special.2010.01.27
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It is a protrusion of the cell sticking out of the epic al surface.
伸出细胞的美丽表面。
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The lunar lander,controlled by a computer, dropped toward the airless surface of the moon.
VOA: special.2009.07.15
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In some senses most of the cells in our body are stuck to a surface.
大部分情况下,我们体内的细胞都黏联在某个表面上
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Drop several seeds over the surface of the pot and cover with a thin layer of vermiculite, a substance that can hold air, water and nutrients.
VOA: special.2009.04.21
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This property of cells in culture is called anchorage dependence - that the cell needs to be anchored to a surface in order to function properly.
体外培养细胞的这种特性,称为贴壁依赖性--,意思是细胞必须固定在,某个表面上才能正常生长
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The designs and images on the surface of a tapestry are woven into the cloth as opposed to being only on the surface of the cloth.
VOA: special.2009.11.04
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The one that's on the top here is called ligand-gated ion channel and an ion channel is a protein that sits in the surface of a cell.
最上面的这个叫作配体门控离子通道,离子通道是一类位于细胞表面的蛋白
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This would depend on the total surface area of roofs in a city.
VOA: special.2010.03.02
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We've learned how to identify and catalog cells according to the composition of proteins on the surface and those proteins that distinguish a cell are often called marker proteins.
我们学会了如何按照表面的蛋白成分,来识别并分类细胞,而这些用来区别细胞的蛋白,通常称为标记蛋白
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So, it doesn't need to bind to a receptor on the surface of the cell in order to work because the molecule can actually enter the cell directly.
所以无需与细胞表面受体相结合来起效,因为这些分子能直接进入细胞
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