The past is always tense, the future perfect.

I'm not a businessman, I'm a business, man.

A legal system is a system of rules which are valid according to the system's own criteria of validity.

History teaches us that in 100 years from now some of the assumptions you believed will turn out to be wrong. A good question to ask yourself today is “What might I be wrong about？”

如果明智地使用，技术可以成为可持续森林管理的最大盟友。