0 If an unpleasant action or remark is unprovoked, it has not been caused by anything and is therefore unfair. -- （令人不快的言行）无端的，无缘无故的
Human exposure through biting incidents, especially unprovoked attacks, should be treated immediately with rabies post-exposure treatment and the bat, where possible, retained for laboratory analysis.
This interpretation is rendered less persuasive by the fact that cross-sectional studies of impulsive aggression to date have measured subjects in an unprovoked state.
This she attempted to do by producing two female witnesses to an act of extreme violence, which, because no context is described, appears to be both unprovoked and irrational.
It is a totally unprovoked curb on free speech.
It was a completely unprovoked attack and the child and school staff had no way of knowing that the animal would enter the school.
It was an unprovoked attack, which we must condemn.
We read of "unprovoked attack and aggression"and"flagrant breaches of treaty," and then all the necessary machinery will come into operation when these incidents occur.
Can we in these humiliating circumstances afford to acquiesce in deliberate, unprovoked and, from every point of view, unjustifiable attacks on peaceful merchant shipping?
