选择理论忽略了我们所知道的关于人类的大部分知识。
Sometimes the only way out is through.
Innovation in forestry isn't optional; it's essential for survival.
Mathematics knows no races or geographic boundaries; for mathematics, the cultural world is one country.
用户的需求是我们创新的源泉。
The writer's task is to illuminate the dark corners of the human heart.