Most of us look away when we pass strangers.The demolition and reconstruction of public life is the result of personal decisions made every day.It's the resolution to be a civil, social creature. This may be a peak period for the battle against the spread of a waistline and creeping cholesterol.But it is also within our will power to fight the spread of urban rudeness and creeping hostility. 作为大众，我们可以改变一天的面貌，一时的情绪，以及人们对某件事的感觉。

答案：As individuals we can change the contour of a day, the mood of a moment, the way people feel.

总结：
1. As common people, we can change our appearance, mood at the first time and the feelings on something.
2. As the public,we can change the outlook of a day, the mood of a moment and the feeling towards certain issue.
3. Being a populace,we can change one day's visage,one time's mind,and people's feeling for one thing.