As to the changes to the technical content of the specification, in truth, the protocol has really not changed all that much.
至于在技术内容方面，实际上协议并没有很大改动。
Hastings changed the video rental, video delivery system, and premium content access infrastructure models, all within just 13 years.
哈斯廷斯改变了影片出租，视频出租系统和专享服务内容来访问基础设施模型。
And the components and content of oil have all changed: some of hydrocarbons with the higher boiling point are degraded into low-carbon hydrocarbons with low boiling point.
石油的组分及各组分的含量都发生了变化：其中一些沸点较高的烃类都降解成了沸点较低的低碳烃类。
21pm Why? Because the devices have changed. "they now all have photos, they now all have video." Basically, you want all your content everywhere all the time.
21pm为什么？因为现在的设备正在不断的更换。“它们现在都有了照片，都有了视频。”基本上，你想要让你的文件在所有设备上同步。
21pm Why? Because the devices have changed. "they now all have photos, they now all have video." Basically, you want all your content everywhere all the time.
21pm为什么？因为现在的设备正在不断的更换。“它们现在都有了照片，都有了视频。”基本上，你想要让你的文件在所有设备上同步。
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