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All these cells come from the bone marrow and biologists have traced the formation of these cells in great detail.
所有这些细胞都来自骨髓,而生物学家已经很详细地,研究了这些细胞的形成过程
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You know probably that within your bone marrows there's populations of cells, there are different kinds of cells within the bone marrow.
你也许知道的,在你的骨髓里,有许多种细胞,骨髓中有不同种类的细胞
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The pressure points come when the issues are so close to the bone that a variety of people don't feel that they had the luxury to do that, that their interests, their commitments are threatened.
有时也有一些压力,这时话题通常比较敏感，许多人,觉得言论自由成为了一种奢侈品，他们的兴趣和信仰都受到了威胁。
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And in conclusion he imagines giving up that terrific drive towards imagination and idealization and a return to the "rag and bone shop of the heart."
结尾时他想象,放弃这一想象力和理想化的,极妙的创作驱动力,回到污秽的心的废品铺“
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If you were searching for unique populations of cells within the bone marrow what tools would you use to look for them?
如果你要在骨髓中,找一组特定的细胞群,你用什么工具来找呢
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There's a lot of interest in bone marrow and the stem cells that come from bone marrow and there's a couple of reasons for this.
人们对骨髓以及从骨髓中,提取的干细胞有着浓厚的兴趣,这其中有多种原因
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Through many decades of study, biologists have teased out certain populations of cells within the bone marrow that are capable of reproducing subsets of cells.
经过数十年的研究,生物学家们在骨髓中发现了,一些细胞群,它们能够生成细胞亚群
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Of a million cells in the bone marrow there might only be one of these.
一百万个骨髓细胞中,也许只有一个多能干细胞
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We'll talk in a minute about stem cells that are involved in generation of blood and they develop and they live in the bone marrow.
我们一会儿要说到,和血细胞再生有关的干细胞,它们发育并储存在骨髓中
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It was the first place where the concept of stem cells was developed, in that if one looks carefully one can find immature cells in the bone marrow.
这是干细胞概念的发祥地,如果仔细观察造血系统,就能找到骨髓中的未成熟细胞
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In this diagram I'm showing you it's easy to tell because some are yellow, and some are pink, and some are blue but that's not the way they come out of the bone marrow.
在我给你们看的这张图表中很简单,因为其中一些细胞是黄色的,有些是粉红的,有些是蓝的,但它们在骨髓里没有这些颜色
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