Are you not doing your work up to the required standards?

工作达不到规定的标准吗？

So let's work up to some code that does something with the XML.

我们就来编写一些代码对XML做点什么吧。

One in five even speculate we will have to work up to the age of 75.

五分之一的人甚至怀疑我们将不得不工作到75岁，这对那些50岁的人来说也不是什么好消息。

You may want to begin simply and then work up to more complex configurations.

可以从简单的开始，然后逐渐进行复杂的配置。

You might start on the flats and work up to more demanding and difficult terrain.

你可以先在平路上练习，再慢慢挑战要求更高、难度更大的路面。