Better never means better for everyone... It always means worse, for some.
乐观是正常的，但一些幸运的人比我们其他人更乐观。
The greatest danger to American agriculture is the loss of the family farm.
Color is my day-long obsession, joy, and torment.
Paths are made by walking.
控制的目的是使系统在存在不确定性和干扰的情况下仍能按期望的方式运行。