What does 表面 (biǎo miàn) mean in English?

Card 46HSK 2010 Level 546/1311
CARD46
PROGRESS4%
表面
錶麵
biǎo miàn
surface; face; outside; appearance

Reveal: Click/Space/Enter/↑↓/w/s/j/kNavigate: ←→/h/l/a/d