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问题: off少见的用法,what is it and why?

If Lucy alters her selection
to 99, the outcome will be (99, 100), and she will earn
$101. Because Lucy is better off by this change, the outcome
(100, 100) is not a Nash equilibrium.

解答:

这里off 是形容词,意思是“有某种东西(主要指money)数量的多少"。
常和well,badly,better等连用。

be well off: 有钱,富有;be badly off: 贫穷,没钱。由此派生的形容此有well-off,better-off,best-off,badly-off,worse-off,worst-off.意思不言自明。

Lucy would be better off choosing a number larger than 2. 如果选大于2的数,得的钱会更多。