Hi everybody. I hope you all had a safe and happy Fourth of July, filled with parades, cookouts（野餐）, fireworks and family reunions. We celebrated at the White House with a few hundred members of the m
Our human population has risen significantly 这时 人类人口大幅增加了 It went from one and three quarters to 2.3 billion just a couple of decades 仅仅二三十年时间 从17.5亿增加到了23亿 As a boy at the New York Worlds Fair in 196
What makes the world go round?Love?Money ?Energy ?Or science and technology ? 是什么东西让世界延续？爱？金钱？能源？还是科学技术？ Yes ,all of them ,but there's another important element, the spirit of courage and determin
当地时间4月28日，美国总统奥巴马出席白宫记者年会。晚宴期间，奥巴马大秀幽默功力，不仅拿特工招妓丑闻、麦克风门等事件开涮，还恶搞罗姆尼、希拉里等人，搞活宴会现场气氛。 大选年，奥巴马为了博得选举天然不肯放过任何一个推销自己的机会。在此次的白宫记者协会接待晚宴的演说中，奥巴马锋利吐槽、大度自嘲，暗讽对手，用诙谐幽默也给自己加分不少。 Host：Could someone back there ple
