plunk down英 [plʌŋk daʊn]美 [plʌŋk daʊn]突然落下;付给英英释义verbset (something or oneself) down with or as if with a noiseHe planked the money on the tableHe planked himself into the sofaSynonym:plankflumpplonkplopplunkplump downplump双语例句