词汇讲解:
1. broadcast vt.广播; 播放
例句:The concert was broadcast by relay.
这场音乐会是实况转播的。
2. involve vt.包含; 使参与,牵涉
例句:The guidelines involve only microeconomic reforms.
指导方针仅仅包含微观经济改革。
3. protect vt.保护,保卫
例句:Game laws protect wild life.
狩猎法保护野生动物。
4. present vt.介绍; 出现
例句:A vivid picture was present to his mind.
一幅生动的画面出现在他的脑海里。
5. electricity n.电力; 电流
例句:This machine goes by electricity.
这台机器是由电力推动的。