用户可以将要执行的每个查询定位到片的一个子集。
Actually, the proposal focuses on a particular subset of megafauna, the kind that lived during the Pleistocene epoch.实际上,这个提案关注的是生活在更新世时期的巨型动物的一个特定子集。
You could construct all subsets, check that the weight is less than the weight of the knapsack, and then choose the subset with the maximum value.你可以构建所有子集,检查重量是否小于背包的重量,然后选择最大值的子集。