Satisfactory: 使你满意的东西或事件，比如服务态度或者一个人给你的回应或答复。通常用来形容达到你的标准的东西（比如服务态度），但不能用来形容卓越的服务。 比如： -The service was satisfactory. Satisfying: 满足个人的，或某种需要，满足欲望，比如食欲。 -The meal/food is satisfying

satisfactory - it`s the adjective, discribing something or somebody - satisfactory result, satisfactory marriage. satisfying - it`s about some condition - We shall give integer values to the variables x, y, and z, satisfying the inequalities F . It's because she arouses in us a need for love, and is not capable of satisfying it.