There are just two hydrogen atoms per cubic centimeter on average in space, which poses no threat to spaceships traveling at low speeds.

太空中平均每立方厘米只有两个氢原子，这对低速飞行的宇宙飞船不构成威胁。

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In Yunnan, there are more than 10,000 cubic meters of water per person, four times the national average.

在云南，平均每人拥有的水资源多达10,000立方米，4倍于全国的平均水平。

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In Yunnan, there are more than 10, 000 cubic meters of water per person, four times the national average.

在云南，平均每人拥有的水资源多达10,000立方米，4倍于全国的平均水平。

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Estimates for this upcoming week are a takedown of another 80 to 100 billion cubic feet which would put the final storage heading into spring only near 1.8 trillion cubic feet, shouting distance from the five year average.

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The radon concentration in the average UK home is about 20 becquerels per cubic metre.

BBC: Radon

At less than 1, 200 cubic metres a second, this flood is smaller than even an average spring flood, let alone one of the mightier deluges of the past.

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