释义:看见一片落叶,就知道一年内的时间将要到头了。通过细微的迹象,可以预料到整个形势的发展趋向与结果。
The psychologist must study the mind as it is, not as it ought to be.
Sustainability is not an option; it's a responsibility we owe to future generations.
Liberty cannot be preserved without a general knowledge among the people.