实际发展水平与潜在发展水平之间的距离，前者由独立解决问题决定，后者由在成人指导下或与更有能力的同伴合作解决问题决定。

可持续性不是一种选择；它是我们对后代的责任。

Acting is not about being someone different. It's finding the similarity in what is apparently different, then finding myself in there.

The dairy industry must evolve to meet both consumer demands and environmental responsibilities.

构思得好的东西表达得也清楚，表达的文字也很流畅。

我不是说唱歌手，我是一个创造历史的人。