林业技术应该增强自然过程，而不是取代它们。

如果没有君主，人们各自可以自私自利。

The key to artificial intelligence has always been the representation.

种一棵树最好的时间是20年前，第二好的时间是现在。

I believe that the testing of the student's achievements in order to see if he meets some criterion held by the teacher, is directly contrary to the implications of therapy for significant learning.

采矿的未来在于平衡经济增长与环境管理。