Moreover, today, more than half of the world's population 除此以外，超过世界人口的一半以上 live in cities. 都居住生活在城市。 In the developed world, it's about 78 percent. 在发达国家中，这种比例达到了78%。 More than three out of fo
Five years ago, I experienced a bit of what it must have been like to be Alice in Wonderland. 五年前，我曾有过一个有如漫游爱丽丝仙境的经历。 Penn State asked me, a communications teacher, to teach a communications class for
Hi, everybody. Yay（哇） , we’re here, we’re doing it! (Applause.) It’s so exciting. I am thrilled. I have been waiting for this day for a long, long time, and it is finally here. And I
