He lay listening to the steady drum of the rain on the roof.他躺着聆听雨点打在屋顶上的咚咚声。She dashed out through the door, her stockinged feet thumping softly as she ran up the stairs.她穿着袜子冲出房门，跑着上楼梯时发出轻柔的咚咚声。At the rat-a-tat of the knocker her heart flew into her mouth.听到敲击者咚咚声她的心都悬起来了。