价格变化一定不能负面地影响人们的生活水平。
Price changes must not adversely affect the living standards of the people.
它们的价格在$3到$15之间变化。
整整一天,股票价格时涨时跌,不断变化。
since all the information is in the current price, you don't have to worry about whether it went up or down yesterday, to decide what it's going to do today.
因为当前价格代表了所有信息,你就不需要去考虑昨天股价,是涨了还是跌了,再去判断它今天的价格会怎么变化。
We're going to try and figure out how the price should change.
我们将要尝试去弄明白,这个价格会怎么变化。
How do the prices and yields look at various points in time?
在不同的时点上,价格和收益会怎样变化呢
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