重点讲解:
1. enable sb. to do sth. 使能够;使有机会;
The new test should enable doctors to detect the disease early.
新的检测手段应该能够使医生们尽早查出这种疾病 。
2. a constituent of 成分;要素;
Glycerol is a constituent of all fats and phospholipids.
甘油是所有脂肪和磷脂的组成部分 。
3. so to speak 可以说;可谓;
I ought not to tell you but I will, since you're in the family, so to speak.
我本来不该告诉你的,但我还是要这么做,因为好歹你是家里的一员 。
4. because of 因为;由于;
It was very difficult to see our way because of the fog.
由于有雾,我们很难看清道路 。
adj. 基本的,根本的,重要的
n. 基本原