Roughly 30,000 children and their parents from across the country were able to get tickets through the Internet for this year's White House Easter Egg Roll.

VOA: standard.2009.04.13

You've taken all the proteins inside the white of the egg, for example, you raise the temperature.

对蛋清部分所有的蛋白质,比如说进行加热

耶鲁公开课 - 生物医学工程探索课程节选

There's only one source for that, there's only one source of that fertilized egg.

它的来源只有一个,受精卵的来源是唯一的

耶鲁公开课 - 生物医学工程探索课程节选

Now, you all know that we can make irreversible changes in proteins, you can denature them completely, that's what happens when you cook an egg for example.

现在你们都懂蛋白能够发生不可逆的改变,能够完全变性,比如在你煮鸡蛋的时候就是这样

耶鲁公开课 - 生物医学工程探索课程节选