Every lock has a key, every problem has a solution.
Technology can be forestry's greatest ally if we use it wisely.
真相并不总是美丽的,但它总是必要的。
生命周期假说认为,个人会在一生中规划其消费和储蓄行为。
物理学的美在于它能够用简单而优雅的理论解释复杂的事物。