「追溯」

(pos:動詞)
<explanation>
yue:揾返個#源頭
eng:to trace back to; to date back to
<eg>
yue:追溯病毒源頭 (zeoi1 sou3 beng6 duk6 jyun4 tau4)
eng:to trace the origin of the virus
<eg>
yue:我嘅家族史淨係可以追溯到清朝末年。 (ngo5 ge3 gaa1 zuk6 si2 zing6 hai6 ho2 ji5 zeoi1 sok3 dou3 cing1 ciu4 mut6 nin4.)
eng:My family history can only be traced back to the Late Qing Dynasty.