分类：教育/科学-外语学习
问题：请问这里的functional怎么理解，谢谢Rehabilita 
Rehabilation programmes should make it possible for disabled persons to take part in designing and organizing the services that they and their families consider necessary. Procedures for the participation of disabled persons in the decision-making relating to their rehabilitatRehabilation programmes should make it possible for disabled persons to take part in designing and organizing the services that they and their families consider necessary. Procedures for the participation of disabled persons in the decision-making relating to their rehabilitation should be provided for within the system. When people such as the severely mentally disabled may not be able to represent themselves adequately in decisions affecting their lives, family members or legally designated agents should take part in planning and decision-making.Efforts should be increased to develop rehabilitation services integrated in other services and make them more readily available. These should not rely on imported costly equipment, raw material and technology. The transfer of technology among nations should be enhanced and should concentrate on methods that are 【functional】 and relate to prevailing conditions.
回答：我认为是“有效的”的意思