详细解释:n. 扑通声, 掉下
ad. 扑通一声地
vt. 把...沉重地放下
vi. 扑通落下
词型变化：
动词过去式:plopped过去分词:plopped现在分词:plopping第三人称单数:plops英语解释：
名词 plop:
the noise of a rounded object dropping into a liquid without a splash动词 plop:
drop something with a plopping sounddrop with the sound of something falling into waterset (something or oneself) down with or as if with a noise同义词：plank, flump, plonk, plunk, plump down, plunk down, plump