练习内容：
跟读并模仿《新概念英语第四册》Lesson 35-2 Space odyssey
Because the gravity on the Moon's surface is only a sixth of Earth's(remember how easily the Apollo astronauts bounded along), it takes much lessenergy to accelerate to that 1.5 miles per second than it does on Earth.Moon-dwellers will be able to fly in space at only three per cent of the costof similar journeys by their terrestrial cousins.
Arthur C. Clark once suggested a revolutionary idea passes throughthree phases:
1 'It's impossible -- don't waste my time.'
2 'It's possible, but not worth doing.'
3 'I said it was a good idea all along.'
任务配置：
L0 + L4
练习感受：
舌头开始打结了
