扑通一声 pū tōng yī shēng

DEFINITIONS

  1. with a thump

CHARACTERS

扑 pū
HSK 6
pound, beat, strike; attack
通 tōng
HSK 4
pass through, common, communicate
一 yī
HSK 1
one; a, an; alone
声 shēng
HSK 3
sound, voice, noise; tone; music