If I asked you to name a microbe that's living in your gut, many of you would probably say E. coli. 如果请你举例说出一个生活在你肠道里的微生物，很多人可能会说大肠杆菌。 A lot of people say this. It's the best-known of the gut microbes
Obama's Weekly Address WEEKLY ADDRESS: Happy Holidays from the President and First Lady 奥巴马每周电视讲话:总统和第一夫人圣诞祝辞 THE PRESIDENT: Merry Christmas everybody! Now, we’re not going to take much of your
英语演讲稿-01 with the development of science and technology, change has penetrated into every aspect of our daily life. to illustrate that, i'd like to make a comparison of these two seemingly insignifi
