What theory to base upon?

依据什么原理创建？

This is base upon the monsters chance to drop an item.

这是在掉落一个项目的怪物机会之上的底。

HTTP version 1.1 serves as the base upon which HTTPR builds its reliability.

HTTP版本1.1是HTTPR建立其可靠性的基础。

Fifth, to base upon reality, and adopt all kinds of good qualities, to create and develop the culture.

第五，立足现实博采众长，实现文化创新发展。

Base upon the obtained experimental result, the mechanism of sand compacting with air flow is discussed.

在所得试验结果的基础上，探讨了气流对型砂紧实的机理。