重點講解:
1. a couple of 兩個;幾個;
例句:He gave a couple of loud rings on the doorbell.
他使勁地按了幾下門鈴 。
2. get used to sth./doing sth. 開始習慣于;
例句:I've got used to being a vegetarian.
我已經習慣吃素食 。
3. fall off 脫落,掉落;
例句:To my great amusement his false beard fell off.
使我感到極其好笑的是他的假胡子掉下來了 。
4. keep on 重復;繼續;
例句:She kept on working although she was tired.
她雖疲勞但仍繼續工作 。
adj. 緊張的,壓力重的