Letting her friend borrow her car was an impulsive act that she immediately regretted.

让朋友借走她的车是她立刻就感到后悔的冲动行为。

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Those few who defiantly choose to act in a hasty manner will regret their impulsive actions later.

那几个挑衅选择谁草率行事方式将后悔自己冲动的行为后。

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But I like to think that I hold on to that single, cold pellet of metal as a reminder of how tenuous life is and how one impulsive act can have immense and rippling consequences.

我只保存了那一颗冰冷的子弹，希望提醒自己生命何其脆弱，一时冲动就可能造成巨大且影响深远的后果。

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We understand that suicide can be an impulsive act and that alcoholism, substance abuse and access to lethal means can increase its likelihood.

CNN: Why more Americans are dying of suicide

If sharing music was a deliberate act back then, today it is becoming an impulsive one.

FORBES: Will Music On Facebook Make Us Flightier Listeners?