If you plan properly, you'll know that you only need, say, 350g of beef and six rashers of bacon, not whatever weight is prepacked in the supermarket chiller.

例如，如果你计划得当，你就会知道你只需要350克的牛肉和6薄片培根，而不是超市冷冻柜里预先包装好的任何重量的食材。