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They might be 100 nanometers or so in diameter, whereas, a cell is ten microns or so in diameter.
直径只有一百纳米左右,而一个细胞的直径是十微米左右
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Movement down a concentration gradient occurs fairly rapidly over short distances like a micron or so, like the size of a bacterium.
顺浓度梯度扩散在一微米左右的短距离内,相当迅速,一微米相当于一个细菌的大小
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And, in this case, they had foil that was less than a micrometer thick.
这样的话，他们采用的箔的厚度小于一微米。
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The gap could be about one ten-thousandths of a millimeter wide.
这个缝隙大约只有0.1微米那么宽
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Because of that you can't count on molecules moving rapidly over the size of a cell that's ten to 30 Microns in diameter.
因此不要对生物大分子能在,直径十到三十微米的,细胞里高速穿行抱有任何指望
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It's much larger than a bacterium, it's ten to 30 microns let's say instead of one to two microns, so almost ten times bigger.
人类细胞比细菌大得多,有十到三十微米那么大而不是一两微米,几乎大了十倍
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Bacterial cells are small, one to two microns in diameter and this shows a picture of a common bacterium called E. Coli.
细菌细胞很小,直径只有一到两个微米,这张图片是一种常见细菌,大肠杆菌
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