unit2 Cloning
1. differ vi. 不一样于，意见相左
differ from 不一样于... differ in...在...方面不一样
My younger brother and I differ from each other in many ways.我弟弟和我在许多方面都不一样。
拓展；different adj. 不一样，有区分difference n. 差异，差异
2. exact adj. 准确，准确
to be exact(=exactly speaking) 确切地说
翻译：我不知道这个房间确实切面积。I don't know the exact size of the room.
拓展：exactly adv. 确切地，准确地