资料来源 : pyDict

放在膝上代替餐桌的小板,膝板

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Lapboard \Lap"board`\, n.
   A board used on the lap as a substitute for a table, as by
   tailors.

资料来源 : WordNet®

lapboard
     n : writing board used on the lap as a table or desk