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Consumers also want computers and cell phones, but in cities, these are no longer status symbols.
VOA: standard.2009.09.28
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One of the most obvious things about a red blood cell is it doesn't have nucleus, it has no nucleus.
红细胞最为明显的不同就是,它是无核的,它没有细胞核
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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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No mystery about what it's like to be a cell phone.
作为手机也一样。
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And what he found is that all the major cell types of the ear develop no matter what types of the ear develop no matter what environment this ball has been transplanted in.
他发现,不论植入的环境如何,所有的主体耳细胞,都发育成型了。
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It's no longer a stem cell but it's a progenitor cell.
它不再是干细胞而是祖细胞
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It's no longer capable of self-renewal to form another stem cell.
不再能自我更新,从而生成另一个干细胞了
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No. Cell phones don't have any experience at all.
不，手机本身没有任何体验。
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