n.激怒；挑釁；激怒的原因
He flares up at the slightest provocation. 稍一激他，他就大發(fā)脾氣。
She sometimes angers with little or no provocation. 她有時無緣無故就生氣。
They did not react to this provocation. 他們對這一挑釁未作反應(yīng)。
