我不是一个回头看的人,我总是向前看。
Sustainability isn't an option; it's a necessity for the future of our planet.
想要行善的人在门外敲著门:爱人的,看见门是敞开的。
Every mathematical problem has a solution; it's just a matter of finding the right perspective.
The writer must be able to superintend himself and criticize himself.