五千年(敝帚自珍)

主题:【讨论】哪位大侠就三峡问题来个科普系列吧 -- 斯人

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家园 这个不是噱头,国外也这么说的

比如Wiki上对百年一遇的洪水的解释

A one-hundred-year flood is calculated to be the level of flood water expected to be equaled or exceeded every 100 years on average. The 100-year flood is more accurately referred to as the 1% annual exceedance probability flood, since it is a flood that has a 1% chance of being equaled or exceeded in any single year.[1] Similarly, a flood level expected to be equaled or exceeded every 10 years on average is known as a ten-year flood. Based on the expected flood water level, a predicted area of inundation can be mapped out. This floodplain map figures very importantly in building permits, environmental regulations, and flood insurance.

这个词条还没有中文版的。

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