Previously it was thought there were around 100, 000 microbial cells in every litre of seawater but scientists now think there could be one billion.
在此前的推测中，每一升海水中可能会有大约10万个微生物细胞，但现在科学家们认为有可能达到10亿个。
Previously it was thought there was around 100, 000 microbial cells in every litre of seawater but scientists now think there could be one billion.
在此前的推测中，每一升海水中可能会有大约100,000个微生物细胞，但现在科学家设想这一数字有可能达到十亿。
The human brain contains an average of ten billion neurons or nerve cells, each of which is linked with one thousand to ten thousand other neurons.
人的大脑平均有100亿个神经元，或者叫做神经细胞。每个神经元与其它一千至一万个神经元相连。
Did you know that you have one hundred billion nerve cells in your brain, and every nerve cell has many connections to other nerve cells?
你知道在你的大脑里有1000亿个神经细胞，并且每个神经细胞都和其它细胞有着千丝万缕的连接么？
If you travelled in a time machine back one billion years, you would see many clumps of cells resembling modern cancer tumours.
如果你乘坐时间机器去10亿年前旅行，你会看到很多和肿瘤细胞极其相像的细胞丛。
The human brain contains several billion nerve cells, which are connected with one another by fine nerves.
人类的大脑含有几十亿个神经细胞，这些细胞由纤细的神经将彼此连接起来。
The human brain contains several billion nerve cells, which are connected with one another by fine nerves.
人类的大脑含有几十亿个神经细胞，这些细胞由纤细的神经将彼此连接起来。
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