Good morning，ladies and gentlemen. I am Tracy from Guangzhou Huamei International School. I am a shiny girl. My family love me and I love then too. Do you know how help at home? Let me tell you about
One car emits four tons. And actually 700 and change million cars today emit 2.8 billion tons of CO2. 一辆汽车排放4吨二氧化碳。现在的7亿辆汽车排放28亿吨二氧化碳。 That's, in the additive, about 25 percent of our problem. 那只是我们所有
And that sort of fairness is more important than we may sometimes realize. 这种公平性有时比我们认为的更重要。 Very few people think about politics all the time. 很少人成天思考政治。 Some even skip it at election time. 有些人甚至忽略选举
Now, I have this device on. I didn't want to take my shirt off to show you, but I can tell you it's on. 现在我的身上有一个类似的设备。我不想把衬衫脱掉给各位看，但是可以告诉大家我的确戴着它。 This is a device that not only measures cardiac rhyt
