demonstrations例句
Demonstrations, films, and videotapes are shown for your edification.
采用了演示及播放電影和錄像帶的形式，以起到教育作用。
Lectures will be interspersed with practical
demonstrations.
講課中將不時插入實際示范。
The scientist elucidated his theory by three simple
demonstrations.
這位科學家以三個簡單的實例來說明他的理論.