scratchboard / ˈskrætʃˌbɔrd, -ˌboʊrd /

🎓大学词汇划线板刮痧板刮板划痕板

scratchboard 的定义

n. 名词 noun
  1. a cardboard coated with impermeable white clay and covered by a layer of ink that is scratched or scraped in patterns revealing the white surface below.