pit-a-pat
/ˌpɪtəˈpæt; `pɪtəˌpæt/ (also pitter-patter / ˌpɪtəˈptə(r); `pɪtɚˌpætɚ/) adv with the sound of quick light steps or tapping 有轻快的步伐或拍击声的; 劈劈啪啪地
Her heart/feet went pit-a-pat. 她的心噗噗地跳[她的脚步声劈劈啪啪的]. pit-a-pat (also pitter-patter), n this sound 劈啪声
the pit-a-pat of the rain on the roof 雨点打在屋顶上的劈啪声.