All I could hear was the steady clacking of a solitary typewriter.我所能听到的一切是一部孤零零的打字机不断发出的噼啪声.She heard his footsteps clacking along the concrete pavement.她听到他的脚步声啪嗒啪嗒地沿水泥人行道走去.Stop clacking your pencils!别弄得铅笔噼啪乱响!...

v.噼啪响( clack的现在分词 )...

clacking的音标：...