两个物体的相互作用力总是大小相等，方向相反，同时出现或消失且作用于同一直线上。

登高山须从低处开始，走远路要从近处开始。

I keep thinking about this river somewhere, with the water moving really fast. And these two people in the water, trying to hold onto each other, holding on as hard as they can, but in the end it’s just too much. The current’s too strong. They’ve got to let go, drift apart.

译文：能够认清时代潮流形势就是出色的人物，能够通晓随机应变之术的人才是英雄豪杰。赏析：社会在发展，科技在更新，人的思想也要与时俱进。我们不能用陈旧的思想去指导我们的行为，待人处事一定要圆滑，不可太死板僵化，要学会察言观色，随机应变。

Innovation in forestry practices is the key to balancing economic growth and environmental preservation.

Adaptability is the currency of the modern business world.