TED translations are made possible by volunteer translators. Learn more about the Open Translation Project.
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发布日期：2018-06-13 10:28:22 作者：微世推-张峰波 浏览次数：125If you want to get even more from TED,like the ability to save talks to watch later,sign up for a TED account now.TED translations are made possible by volunteertranslators. Learn more about theOpen T
TED translations are made possible by volunteer translators. Learn more about the Open Translation Project.
