DNA is the fundamental molecule the carries genetic instructions that help build the living world. DNA是携带遗传指令最基本的分子，帮助建造了生机勃勃的世界。 Humans have DNA. Pigs have DNA. Even bacteria and some viruses have DN
开场白-01、问候听众，介绍自己。 Good morning/afternoon/evening, ladies and gentleman, Thank you for being on time / making the effort to come today. Let me introduce myself first. My name is... I am pleased t
Weekly Address: Time for Action on Financial Reform for the Economy As a key committee in the Senate takes up reforming the ways of Wall Street, the President lays down a marker: “I urge those in the
