Curve A might represent the frequency distribution of the number of days' supply on hand in the perishable grocery business.
曲线a 可用以刻画食品商人手中易霉货物储备天数的频率分布。
Heart transplant, bypass and cancer patients would also benefit from having a guaranteed supply of blood on hand for their surgery.
这种方便有保证的血液供应也会让需要做心脏移植、心脏塔桥手术的患者以及癌症患者受益匪浅。
A disaster can easily disrupt the food supply at any time, so plan to have at least a 3-day supply of food on hand. Photo of cans of food.
灾难在任何时候都可轻易扰乱食物供应,所以至少要在手头上准备3天的食物供应。
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