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。
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?
The runner was retired put out at first base. 跑垒者于第一垒上被刺杀出局。
The runner went to second base on a wild pitch. 一记瞎设让跑垒员跑上了第二垒。
You cannot enter a military base without a permit. 无通行证者不得擅入军事基地。