doctrine of back to the ancients

例句：

1. 1.The ancient Greek philosopherPlato believed in the existence of anall-powerful god.
   古希腊哲学家柏拉图相信存在一个全能的神。
2. 2. Thescientist's theory aboutthe origin of the universe hasbeen widely accepted by the scientific community.
   这位科学家关于宇宙起源的理论已被科学界广泛接受。
3. 3. The teacher explained the conceptof gravity to his students in a clearand concise manner.
   老师用清晰简洁的方式向学生们解释了重力的概念。