A downpour is a sudden and unexpected heavy fall of rain.
例句
...a sudden downpour of rain.突降的暴雨
英汉词典释义
n.
倾盆大雨
A downpour of rain put out the children’s bonfire.一阵大雨把孩子们的营火都浇灭了。It was the heaviest downpour ever recorded.那是有史以来最大的一场暴雨。The seeds that had been sown were almost completely washed away by a sudden downpour.已经播下的种子几乎被一场突如其来的暴雨全冲走了。