学员们一遍遍听着关于美国人民和他们“虚假”笑容的官方介绍。
The students are listening to a lection on American people and their ‘fake’ smiles.
据官方介绍，它目前已经包含了二十五个内置的简易特效以及其他功能，方便你入手。
With that said, it already includes twenty five built-in easing effects, and other features to get you started.
本文不是官方指南，而是介绍我执行升级的过程，以及我在计划和执行阶段做出的决定和考虑的因素。
This is not intended as an official "how-to" guide, but a discussion on how I performed the upgrade and what decisions and considerations I made during the planning and execution phases.
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