a design is always subject to certain problem-solving constraints For example, two of the constraints on the vacation design problem are the time and money available for the vacation 个设计问题往往要受到某些解决问题的限制条件制约 比如,在度假设计间题中的两个制约条件是度假能用的 间和费用。A design is always subject to certain problem-solving constraints. For example，two of the constraints on the vacation design problem are the time and money available for the vacation． 一个设计问题往往要受到某些解决问题的限制条件制约。 比如，在度假设计间题中的两个制约条件是度假能用的时 间和费用