1. prevalent:common at a particular time 流行的
E.g. Flu is most prevalent during the winter months.
2. prototype :the first form that a new design before it is produced 原型
E.g. Pilots have begun testing a prototype of the new aircraft.
3. intervention:the act of becoming involved in situation in order to change what happens 干預.介入
E.g. He opposed U.S. military intervention overseas.
4..far-fetched:extremely unlikely to be true or to happen 牽強
E.g. The story seems to be far-fetched, yet it happened.
5. maglev:an advanced type of transport system in which a train travels on a magnetic track,
often at very high speeds: 磁浮列車
E.g. The prototype maglev has notched top speeds of 320 mph.