"plop" in Chinese (Simplified)
咚（落水声）- 扔进水里咚一声
Definition
某物掉进水里或软表面时发出的柔和、圆润的声音。“plop”既可以作名词表示这种声音，也可以作动词描述发出这种声音的动作。
Usage Notes (Chinese (Simplified))
“Plop”是非正式用语，多用于模仿实际声音。一般形容小物体掉入水中或软表面。作为动词不用于重或大的物体。也可表示突然坐下（如“plopped down on the couch”）。
Examples
The stone made a plop as it fell into the water.
石头掉进水里发出**咚**的一声。
He dropped the grape and it went plop on the table.
他掉下葡萄，葡萄在桌子上发出**咚**的一声。
A frog jumped into the pond with a loud plop.
青蛙跳进池塘，发出很响的**咚**声。
She took off her shoes and plopped down on the sofa, exhausted.
她脱下鞋子，**扑通**一声瘫倒在沙发上，筋疲力尽。
Ice cubes plopped into his glass as the drink was poured.
倒饮料时，冰块**咚咚**地掉进了他的杯子。
"Just plop the bag down anywhere," she said, waving her hand.
“随便**放**包就行了，”她一边挥手一边说。