The answer is that it is the method used the method of area bombing.

答案在于所用的方法，大面积轰炸的方法。

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His department has a blog and Frazier said he learned the value of being able to keep the public updated quickly in October after a bombing at an area law firm.

他的部门有一个博客，佛雷泽尔表示，在去年10月份一家当地的律师事务所遭到炸弹袭击时，他学到了能够保证公众快速得到信息更新的价值。

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And the Pentagon spokesman, Bryan Whitman, says the bombing also illustrates the difficulty of preventing such attacks, even in a secured area.

五角大楼发言人惠特曼说，爆炸也说明防范类似的袭击有多么困难，即使在安全地区。

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After the years of bombing, the area was scarred with huge gaping holes.

BBC: Afghanistan: Through veiled eyes

This was as a result of some fighting between the Kurds and the Iraqi army and also after some fairly intense bombing in that area.

CNN: Ben Wedeman: Iraqis abandon northern ridge

Tribal leaders in Baghran are known to be unhappy about continued American bombing in the area, which they say has led to unnecessary civilian casualties.

BBC: Mullah Omar 'flees on motorbike'