It is time to decide which platforms to build upon.

现在是决定要在什么平台基础上构建的时候了。

you must build upon in order to have a solid emotional

你必须做的事情是为了建立一份坚定的感情基础。

Import the initial EAR project that you will build upon.

导入您所构建的初始ear项目。

Let's build upon this to learn about using closures in PHP.

让我们在此基础上了解如何在php中使用闭包。

It is a recurring theme that all successful companies build upon.

这是一个不断循环的主题，所有成功的公司无不以此为基础。