Unit6 When was it invented?Section A1. invent v. 发明 inventor n. 发明家 invention n. 发明 可数名词 Edison, a greater inventor, invented many great inventions during his lifetime.2. be used for doing用来做(是被动语态) Pens are used for writing. 笔是用来写的。 Pens arent used for eating. 笔不是用来吃的。3. style 样式，款式 the style of. 的样式/风格 be in style=be in season/fashion 时髦，流行 be out of style=be out of season/fashion 过时，不流行 Thats not my style.那不是我的风格。4. pleasure n. 愉快，高兴 my pleasure
