他多小的风险也不想冒。
所有妇女,不管年龄,有一个小的风险提供一个婴儿身体或精神残疾。
All women, whatever their age, have a small risk of delivering a baby with a physical or mental disability.
如果非常多的人暴露于这种小的风险中,那么面临的将是一个人群问题。
If very large numbers of people would be exposed to a small risk, then you've got a population problem.
Risk pooling means they put a lot of people with independent or low-correlated risk into a pool and reduce the risk for the whole pool.
风险汇聚即,将独立或相关性小的风险汇聚起来,以降低整体风险
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