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。

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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。

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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。

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Some experts estimate that there are four billion devices connected to the internet but, according to researchers at the Stanford School of Medicine, a typical healthy human brain contains about 200 billion nerve cells, or neurons, linked to one another via hundreds of trillions of tiny contacts called synapses, that function like microprocessors.

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