For some public risks, two common characteristics are a potential for catastrophic costs, and a low" subjective" probability( lacking a solid actuarial basis) of the catastrophic outcome. 针对一些个人风险，两个共同的特点是潜在的灾难性代价，和对灾难性的后果只具有较低的“主观上”的概率估价，即缺乏坚实的事实基?
Annual frequency, average cost per stay and average days of inpatient are three main actuarial bases for hospitalization medical insurance. 住院频率、每次住院费用、每次住院天数这些参数的分布是住院医疗保险精算的主要基础。
Problems were solved on an ad hoc basis. 做了一些变通问题便解决了。
Can you sell for us on a commission basis? 你能拿佣金替我们销售吗？
His research formed the basis of his new book. 他的研究成果是他这本新书的基础。