Hi everybody. Earlier this summer, Michelle, Malia, Sasha and I headed west -- to the national parks at Carlsbad Caverns and Yosemite. And I've got to say, it was a breath of fresh air. We explore

So to test it, we did the following experiment. First, we took the story and played it backwards. 我们用以下的实验来测试。我们先将故事倒过来播放， And that preserved many of the original auditory features, but removed the me

I was delighted when I was asked to help open today's conference. 很高兴大家今天邀请我来为今天的会议活动开幕。 I want to start by saying a big thank you to all of the head teachers here today. I know how much is asked of y

演讲的四个目标 1.提供信息; To offer information; 2.使听众感到乐趣; To entertain the audience; 3.动之以情; To touch emotions; 4.使听众行动起来; To move to action; 演讲切忌 1.语速太快; Talking too rapidly; 2.声音单调; Speaking in monotone; 3.声

　　I’m studying in a city that’s famous for its walls. People who visit my city are amazed at the imposing sight of its walls, especially when silhouetted against the setting sun with gold, shining str