慢速英语:The Wayback Machine Shows History of the Internet

音频下载[点击右键另存为]

1. discover vt.发现; 碰见; 撞见
例句：That man will discover the truth.
那个人肯定能弄清真象。

2. exist vi.存在; 生存; 生活
例句：He thought that if he couldn't see something, it didn't exist
他认为自己看不见的东西就不存在。

3. expand vt.扩张; 使…变大; 详述
例句：Engineers noticed that the pipes were not expanding as expected
工程师注意到管道并没有如预期那样膨胀。

4. available adj.可获得的; 有空的; 可购得的
例句：Since 1978, the amount of money available to buy books has fallen by 17%
自1978年以来，可用于采购图书的经费已经减少了17%。

5. design vt.设计; 绘制
例句：They wanted to design a machine that was both attractive and practical.
他们想设计一种既美观又实用的机械。