But waiting around at the Suez ports had an unknown time and cost restriction.

但在苏伊士港口等待的时间和成本都是未知的。

The program generates possibilities based on user inputs about objectives, materials, cost restrictions, manufacturing methods, and so on.

这款程序根据用户输入的目标、材料、成本限制、制造方法等信息生成各种可能的方案。