发射：指匆忙或愤怒地写并发送（通常是备忘录）。
She spent an hour firing off emails to all concerned.
她花了一个小时气冲冲地向有关各方发电邮。
Picking up the phone to disturb a colleague's vacation is a lot harder than firing off an email.
拿起电话打扰一位同事的假期比发邮件困难多了。
The only way to calm this atom down is for it to rid itself of the energy by firing off a photon.
唯一让这种原子回到基态的方式是发射光子，降低自身的能量。
Israel is alarmed by Iran's recent test firing of its longest-range missile and previous threats by its president to wipe the Jewish state "off the map."
VOA : standard.2009.12.28
Yahoo CEO Carol Bartz left the company while firing off a volley of f-words.
In usual form, she was lively and energetic, firing off her iconic brand of common-sense money advice.
Since becoming chief executive two years ago, Mr Urban has been firing off bright ideas for making money.