仿佛突然间销售者就处于一片黑暗之中，不得不在不确定的气氛中磋商价格。
Suddenly the salesperson is in the dark and has to negotiate price in an atmosphere of uncertainty.
当你开始认为除了你之外任何人都已经想通了，不确定性带来痛苦通常在这个时候突然出现。
The pain of uncertainty usually strikes when you start thinking that everyone but you has things figured out.
Valente说他并不确定为什么石竹属植物突然爆发，但他发现这一物种丰度的突然变化契合了一个著名的气候变换，这一变换在二百万年前震荡了整个欧洲。
Valente says he isn't sure why carnations suddenly boomed, but he notes that the profusion coincides with a well-known climate shift that rocked Europe 2 million years ago.
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