我意识到我的这篇blog可能跑题了，你可能也这样觉得或者根本不在乎，但我跑题的原因是因为我说出了自己想说的。
I just realized I went off topic a little on my blog post.. Maybe you think I did or you don't care, but the reason I go off topic is because I just love to say what I feel like saying.
我在这儿跑题了，但我记不起发生了其他什么事，除了我知道它是如何结束的之外。
I'm digressing here, but I can't remember what else happened, except I know how it ended.
也许有的部分会让你觉得有点跑题，但我想先介绍一些背景知识还是很重要的。
You might feel that some parts are irrelevant but I feel that it is important to give some background info.
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