Here's a pretty standard definition: an externality is a cost or benefit that affects society but is not included in the market price of a good or service.

它有一个非常标准的定义：商品的一种成本或收益影响了他人，但这个成本或收益却没有相应的反映在商品的价格上。

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And since the supply of prestige assets must be, by definition, limited, the price of such assets is sure to rise.

顾名思义，炫耀性资产的供给必然是有限的，因此其价格必然也会上涨。

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The price cuts come just days after high-definition game console rival Sony said it would cut the price of its PlayStation 3 by $100 to $299.

就在几天前，作为微软在高清游戏平台领域的竞争对手，索尼表示要将其PS3主机由399美元降至299美元。

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Moreover, points out Mr Schubert, the mid-point of the inflation projection for 2002 is 1.9%, within the definition of price stability.

ECONOMIST: The terrible twos begin | The

For example, the new technology could help shave the typical price of a high-definition television to less than half its current price by this summer and fall.

CNN: Watch for microdisplays this year

Unlike the Bank of England, for example, the ECB gets to write its own definition of price stability.

BBC: Euro crisis: What on earth does ECB do now?