制革厂的废水是其价值观最真实的衡量标准。
A tannery's wastewater is the truest measure of its values.
People believe in God because the world is very complicated and they think it is very unlikely that anything as complicated as a flying squirrel or the human eye or a brain could happen by chance.
几个世纪以来纸张一直是人类知识的载体,我们的责任是确保它再延续几个世纪。#