(pos:名詞)
<explanation>
yue:黐咗啲砂狀嘅打磨顆粒喺上面，用嚟打磨物件嘅紙（量詞：張）
eng:sandpaper
<eg>
yue:攞張砂紙磨一磨佢吖。 (lo2 zoeng1 saa1 zi2 mo4 jat1 mo4 keoi5 aa1.)
eng:Use a sandpaper to polish it a bit.

(pos:名詞)
<explanation>
yue:#文憑、#證書；借指教育程度、#學歷；源自「證書」嘅英文 certificate 嘅第一個音節 （量詞：張）
eng:certificate or diploma (of a course of study or an exam); figuratively, education background
<eg>
yue:讀咁多書都係為張沙紙啫。 (duk6 gam3 do1 syu1 dou1 hai6 wai6 zoeng1 saa1 zi2 ze1.)
eng:We have been studying so hard and that is all for the sake of a certificate.