vbl.索求
After running through16,000 possible designs, the electronic computer picked out the plan for the plant that would produce the most chemicals at the lowest cost accompanied by a set of exact specifications. 在快速处理了16000种可能的设计之后，电子计算机挑选出建一个以最低成本生产最多化学产品的工厂的计划，并附有一份详细说明书。
Any payment exacted for protection. 勒索的钱财强逼某人支付的保护费
A payment exacted for a special purpose; an impost or a levy. 税为某一特定目的征收的费用; 税或征税
