n.(雷暴前常见的)雷暴云砧,雷雨云砧,圆块积云
She heard the sound of the guns thundering in the fog.
她听到雾中传来隆隆的枪炮声。
Someone is thundering at the door.
有人在砰砰地擂门.
Niccolini was thundering up the stairs, taking them two at a time.
尼科利尼一步两个台阶地噔噔跑上楼。