risk-avoid的用法和樣例：
例句
- That risk aversion may find surprising victims.
這種風險迴避會發現意外的受害者。 - Under the assumption that investor is averse to risk and the criterion of expected utility maximum, the calculated formula of the optimum ratio of portfolio investment is given.
文章最後針對絕對風險迴避者，在期望效用最大的意義下，給出了組合證券投資的最優比例的計算公式。
