求翻译：首先，实践是理论的基础，并且对理论具有决定作用，实践比理论更重要。主要表现在：首先，实践是理论的来源，理论产生于实践的需要，哪些事情成为人们的理论对象，取决于人们社会实践的需要和水平是什么意思？

First, the practice is the basis of the theory , and the theory has a decisive role , practice is more important than theory .

正在翻译，请等待...

First, the practice is the theory foundation, and has the decision function to the theory, practices is more important than the theory.Mainly displays in: First, the practice is the theory origin, the theory produces in the practical needs, which matters become people's theory object, is decided in

First of all, practice is the base, and the theory has a decisive role, practices more important than theory. Mainly reflected in: first of all, practice is the source of theory into practice needs, theories of what became the object, depending on the needs and level of social practice

正在翻译，请等待...