北师大版高中英语模块7--Unit 20 lessons3-1

[00:02.70]Unit 20 New Frontiers [00:06.15]Lesson 3 Scientific Breakthroughs [00:10.11]PIONEERS OF SCIENCE [00:12.16]In the summer of 1905, [00:14.40]a young man was sitting at home [00:15.97]after a day's work. [00:18.04]While rocking his one-year-old baby, [00:20.87]he thought something over. [00:22.34]Suddenly, it came to him! [00:24.80]The equation "e=mc2" was born, [00:28.78]an equation which would change [00:30.44]our understanding of the universe [00:32.31]but would also help to create the nuclear bomb. [00:35.86]Albert Einstein was aware [00:37.29]of recent developments, [00:39.38]such as Marie Curie's research, [00:42.33]but he had been working on his own. [00:45.20]His world-famous equation showed [00:47.12]how a small piece of mass could produce [00:50.74]an unbelievable amount of energy. [00:52.98]Einstein then showed [00:54.47]in his "theory of relativity" [00:56.35]that not even time, mass or length [00:59.37]are constant - they change according [01:02.05]to our experience of them. [01:04.13]For example, if we could see people moving [01:06.53]at the speed of light, [01:08.14]they would appear much heavier [01:09.87]and larger and would seem to move very slowly. [01:12.34]

00:00

00:00

MP3下载 文本下载