慢速英语:Obama Joins Head Injury Debate

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1. gather vt.收集; 聚集
例句：All the members of the family gather to enjoy a reunion dinner. 
全家人聚在一起吃团圆饭。 

2. recognize vt.认出; 识别
例句：Her mind seemed to be wandering and she didn't recognize us. 
她好像精神恍惚, 没认出我们来. 

3. concussion n.震荡; 脑震荡
例句： The driver is in hospital with concussion. 
驾驶员因脑震荡住院。 

4. responsibility n.责任; 职责
例句：Are you willing to accept responsibility? 
你愿意承担责任吗? 

5. announce vt.宣布; 述说
例句：Please announce to the children that there will be no school this afternoon. 
请通知孩子们今天下午不上课。