Innovation in forestry isn't optional; it's essential for survival.
林业创新不是可选项,而是生存的必需。
在基本粒子的领域里,物质和力的区别变得模糊。
Psychological truth is found in practical experience.
期权的真正价值不在于其价格,而在于它为持有者提供的灵活性。
In all things, it is necessary to create a system.