onomatopoeia · used in onomatopoeia or phonetic transliterations

哒哒的机枪声打破了战场的宁静。

onomatopoeia · a spoken command given to a horse to urge it forward

赶车的人吆喝一声“哒”，马车就出发了。

onomatopoeia · the onomatopoeic sound of a horse's hooves hitting the ground

清脆的哒哒马蹄声在小巷中回荡。