The past is a shadow that follows us everywhere.
The molecules that mediate pain are ancient, revealing how deeply rooted this sensation is in evolution.
The spirit of moderation should also be the spirit of the legislator.
林业技术应该增强自然过程,而不是取代它们。
The propensity to truck, barter, and exchange one thing for another is common to all men, and to be found in no other race of animals.