Let us take an ordinary,everyday example. Switzerland is famed for its physical beauty,its mountains and lakes,its crisp,clean air. In the spirit of environmentalism,the people exercise self-discipline to maintain and care for their pristine surroundings.

• 且从小的日常例子说起吧：瑞士全国以风景优美著名，到处山湖交错、空气清新，人民都能自我克制，爱护环境，实现环保精神。