【正文】
Lesson 25 Let’s Do an Experiment ? An experiment shows what happens. ?A theory is an idea. ? Please fill the jar with water. ? Let’s do an experiment and prove who’s right. ? Please observe carefully what I do. ? That’s called the scientific method. ? experiment 實驗;試驗 ? theory 理論;學(xué)說 ? jar 廣口瓶;罐子 ? fill 裝滿 ? upside 上部;上邊 ? prove 證實;證明 ?