瞭解切片符號 - Understanding slice notation

問題：

I need a good explanation (references are a plus) on Python's slice notation. 我須要一個關於Python切片符號的很好的解釋（引用是一個加號）。

To me, this notation needs a bit of picking up. 對我而言，此表示法須要一些注意。

It looks extremely powerful, but I haven't quite got my head around it. 它看起來很是強大，可是我尚未徹底瞭解它。

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解決方案：

參考一： https://stackoom.com/question/28T5/瞭解切片符號
參考二： https://oldbug.net/q/28T5/Understanding-slice-notation