New-Concept Lesson 1 : A puma at large

生词：

1. puma 美洲狮
2. at large 逍遥自在
3. spot 看出、发现
   eg：A wild puma had been spotted forty-five miles south of London.
4. accumulate 积累
   eg: As the evidence begin to accumulate,experts from the zoo……
5. feel obliged to do sth 感到不得不做某事
   eg: exprts from zoo felt obliged to investigate to investigate.
6. corner 使走投无路
   eg: unless it's cornered.
7. disturb 令人不安
   eg: It's disturbing to think that ...
8. in the possession of 为……所有
   in the possession of a private collector and somehow manage to escape.

同义词：

1. spotted / seen / found
2. accumulate / add
3. obliged to / be force to
4. claimed / complain / declear
5. extraordinarily similar / very similar to
6. immediately / quickly
7. convinced / believed