All carbohydrates originate from plants.

所有的碳水化合物均来源于植物。

All theories originate from practice.

所有的理论都是源于实践。

Biological lipids originate from ketoacyl and isoprene groups.

生物脂质来源于酮脂酰和异戊二烯基团。

Do remote connections originate from end user devices?

远程连接源自终端用户设备吗？

All theories originate from practice and in turn serve practice.

所有的理论都来源于实践，并反过来为实践服务。