10.sep.2014 reading tips

1.immune to 对...免疫
2.dog：vt.1.紧随; 纠缠；困扰；折磨
               2.跟踪；尾随
Residents of santiago have become somewhat immune to the bomb attack that have dogged their city for the past decade.
3. go off 爆发
 It went off at lunchtime in a packed underground food hall at a busy metro station
4.amputate
vt.1.(用外科手术)截(肢等)
   2.切断；砍掉
   3.删除
 One woman had her fingers amputated
5.