rain (something) down
phrasal verb with rain verb [ I ] uk/reɪn/ us/reɪn/
（通常指猛烈地）使大量降下，雨点般落下；（把…）密集地投下
to fall in large amounts, or to direct something in large amounts, usually forcefully or violently
Bombs rained down on the besieged city. 炸弹雨点般倾泻到被围困的城市里。
Her attacker rained down blows on her. 袭击她的人对她一通狂殴。