Demonstrations, films, and videotapes are shown for your edification.采用了演示及播放电影和录像带的形式，以起到教育作用。Lectures will be interspersed with practical demonstrations.讲课中将不时插入实际示范。The scientist elucidated his theory by three simple ...
The demonstrations erupted into violence.示威游行爆发成暴力行为。...demonstrations of new products.新产品的演示There were demonstrations this weekend in cities throughout North America, Asia and Europe.本周末在北美、亚洲和欧洲的多个城市举行了示威游行。...demonstr...