第20行的目标函数要对食物的总体成本实现最小化，该值是每个决策变量(食物数量)乘以每单位食物成本的结果。

The objective function on line 20 minimizes the total food cost as the total of each decision variable (amount of food) multiplied by that food's cost per unit.

youdao

换句话说，表的一行是作为读写单独一块数据的最小单位。

Put another way, a row of a table is an atomic unit that is read and written as a single piece.

youdao

这一次，单位不是像素，而是相对权重，它们的相对份额被用于扩展或缩小列和行(参见其他注意)。

This time the units are not pixels, but rather relative weights whose relative quotients are used for expanding the columns and rows or inversely shrinking them (see miscellaneous notes).

youdao