黑泥白石光水氹 [－－－－－－－]

Jyutping haak1 nai4 baak6 sek6 gwong1 seoi2 tam5
Pinyin hēi ní bái shí guāng shuǐ dàng

Definitions (粵典–words.hk)
  1. 語句、舊式
    舊時​俾​夜行人​辨認​路面​物件​嘅​口​訣
    an instruction to distinguish things on the ground when walking at night, based on the reflectibility; literally: black (for) soil, white (for) stones and light (for) puddles

黑泥白石光水氹 [－－－－－－－]

Jyutping hak1 nai4 baak6 sek6 gwong1 seoi2 tam5
Pinyin hēi ní bái shí guāng shuǐ dàng

Definitions (粵典–words.hk)
  1. 語句、舊式
    舊時​俾​夜行人​辨認​路面​物件​嘅​口​訣
    an instruction to distinguish things on the ground when walking at night, based on the reflectibility; literally: black (for) soil, white (for) stones and light (for) puddles