Transport of the future

The five words I learned.

1. prevalent: existing very commonly or happening often 流行的；普遍的

    Eg. These diseases are more prevalent among young children.

2. prototype: the first example of something 原型
    Eg.  Pilots have begun testing a prototype of the new aircraft.

3. intervention: the practice of refusing to get involved in a situation 介入；干涉
    Eg. It can operate without human intervention.

4. far-fetched: extremely unlikely to be true or to happen 牽強的；難以置信的
    Eg. At the time, his ideas were considered far-fetched.

5. vacuum: a space that is completely empty of all gas 真空
    Eg. The whole apparatus operates under high vacuum.