免疫系统就像一把双刃剑;它可以对抗癌症,但也需要被控制。
力的统一不仅是数学上的梦想,更是物理上的必然。
Education is the root system that sustains all progress in responsible forestry practices.
Mistakes can be corrected by those who pay attention to facts but dogmatism will not be corrected by those who are wedded to a vision.