And let me use a big Q to be the total quantity produced-- sorry--the total quantity demanded in the market.

用Q代表总产量,对不起,是市场总需求量

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the need or the desire to want to look better and to look younger.

总有想看起来更好更年轻的需求或渴望。

关于整形手术 - SpeakingMax英语口语达人

So total quantity demand is 1 -P where P is the lower of the two prices.

总需求量是1-P,而P是两个公司的价格中较低那个

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