视频对话：
...Hold your ground!
坚守岗位！
Why are they fleeing?
他们为什么要逃跑？
Cowards!
胆小鬼！
本期学习词汇：
flee
vi.逃走，逃掉；消失
vt.逃离，逃避
例句：
1. He slammed the bedroom door behind him and fled.
他把卧室房门重重地关上，然后逃跑了。
2. He fled to Costa Rica to avoid military service.
他逃到了哥斯达黎加以逃避服兵役。
3. The enemy plane flee with the tail between its leg.
敌机夹著尾巴逃跑了。