translation.en: But to get us started, I want to ask if everyone could just close your eyes for two seconds and try and think of a technology or a bit of science that you think has changed the world.
translation.zh: 不过首先 我想请在座各位 闭上双眼在几秒钟内想一想 某种技术或者科学 在你看来，改变了世界