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00:03.04]黑洞 [00:06.09]What is a black hole? [00:07.11] 什么是黑洞呢? [00:08.12]Well,it's difficult to answer this question,since the terms we would normally use to describe a scientific phenomenon are inadequate here. [00:14.11]喔,这个问题很难回答,
大学英语自学教程下
Black and White黑与白 Sometimes you hear it said that white is a combination of all the colors of the rainbow -- and that black is the absence of color. Find out more about whether black and white are colors -- today on Earth and Sky. JB: This is Ear
(科普英语)Earth and Sky
Now, the VOA Learning English program Words and Their Stories. On this program we explain common expressions that we use in everyday life. The world celebrates Earth Day every year on April 22. It is a day to think seriously about how our lifestyles
2018年VOA慢速英语(四)月
Years Ago, The Year Was 400 Days Long 多年前，一年长达400天 Don: Yaeuml;l, do you notice the days changing length over the course of the year? 东：雅瑶，你有注意到一年中每一天的长度在改变么？ Yaeuml;l: Sure, Don, it s
初学者听力文摘精选
Section 30 Climate Change El Nino, which is not an English name, is playing an important part in our lives. We often hear people talk about the strange weather we are having nowadays. The changing wea
英语导读1000句
If, as it now seems, every single galaxy has a black hole at its heart, this can't be a coincidence. Perhaps black holes are an essential part of what galaxies are and how they work. No one had expect
超大质量黑洞