When I left off in Part 2, I had created a navigation structure that presented the iPhone- or iPod-touch user with a list of navigation options.

在撰写完 第 2 部分 时，我已经创建了浏览结构，可以向 iPhone 用户或者 iPod-touch 用户呈现浏览选项列表。

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Must make sure the upper part of the body stabilizes upend in behavioral course, list of prohibit completely left and right sides, before admire after Fu wait for movement lending strength.

动作过程中必须保证上身稳定竖直，禁绝左右侧倾、前俯后仰等借力动作。

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