CNN news 2010-11-02 加文本

1.Officials say those explosives were designed to be set off remotely; they could be triggered with a cell phone.

set off点燃, 爆炸

例句：Be careful that you don't set the fireworks off by mistake.
      当心点, 别弄错了引起那些爆竹爆炸。

      The children are setting fireworks off in the garden.
      孩子们在花园里燃放烟火。

2.Both of them were inside packages that were headed to Chicago, Illinois; never made it there.

head to引至, 通到

例句：The girl headed her little sister to the school.
      姐姐把小妹妹领到学校。