The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.
Seize the day,boys.Make your lives extraordinary.
解释:辅与车互相依存,嘴唇没有了,牙齿就要受寒。
People with a clear sense of identity know who they are and what they stand for. They have a strong sense of self and are not easily swayed by others.