劃定的界線 [划－－－线]

Jyutping waak6 ding6 dik1 gaai3 sin3
Pinyin huà dìng de jiè xiàn

Definitions (Wiktionary)
  1. noun
    dividing line; line of demarcation; borderline; boundary; limits; bounds
    (syn.) 界限, 痕敦, 分野, 畛域, 地界