历史告诉我们，这是因为紫色染料得自海螺，它在阳光下不会褪色，相反，它会变得更明亮，在日晒雨淋之下尤为鲜艳。
History tells us this was because the purple dye harvested from the sea snail did not fade due to sunlight, but instead became brighter and more intense from weathering.
历史学家告诉我们，在大萧条时期表现最好的许多股票其实是所谓的成长型公司的股票，因为这是些有能力征服未来的公司。
Historians note that many of the stocks which did best during the Great Depression were actually so-called 'growth' companies, because they were the ones conquering the future.
是的，历史经验告诉我们住房市场并不是完全竞争的市场。因为有很多的限制条件，比如交易成本，选择偏好等等。
Yes, so we know from experience that the housing market is not perfectly competitive, because of lots of restrictions, there's transaction cost, the searching affection so on and so forth.
是的，历史经验告诉我们住房市场并不是完全竞争的市场。因为有很多的限制条件，比如交易成本，选择偏好等等。
Yes, so we know from experience that the housing market is not perfectly competitive, because of lots of restrictions, there's transaction cost, the searching affection so on and so forth.
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