But deciding what to charge requires careful analysis of such things as break-even points and price elasticities of demand-how buying habits change after a price rise or a discount.

但是定价之前需进行盈亏平衡和需求的价格弹性分析，即提价或打折后购买习惯会发生什么变化。

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They're selling and selling, but no one's been buying the big, mysterious Russian billionaire who actually isn't such a mystery after all.

他们不断卖啊卖啊卖，但没人真敢轻易买神秘俄罗斯大佬的帐，再说他真的有那么神秘吗？

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The concept of group buying for bulk discounts is not new, but its new-found success came years after many failed attempts.

为了省钱而团购的概念并不新鲜，不过在许多失败的尝试的多年后迎来了最近发现的成功。

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The Fed says it will not sell its bonds but just stop buying them after QE2.

FORBES: Market's Tired Technicals Say Correction Is Looming

For banks that have resisted the temptations of the boom, this looks like a golden chance to snap up rivals cheaply. (JPMorgan Chase made a lowball offer for WaMu soon after buying Bear Stearns, but was rebuffed.) Regional banks can also hope to recapture market share from non-banks, as traditional sources of funding, such as deposits, become more important.

ECONOMIST: The bust is starting to catch up with regional lenders

The potential reward of not only keeping profits already made in a rally, but going after more profits from the subsequent market decline, made buying and holding through whatever comes along even less attractive .

FORBES: Stock Market Becomes Short Attention Span Theater Of Trading