blackboards

英 [ˈblækbɔːdz]

美 [ˈblækˌbɔrdz]

n.  黑板
blackboard的复数

柯林斯词典

• 黑板
  Ablackboardis a dark-coloured board that you can write on with chalk. Blackboards are often used by teachers in the classroom.

in AM, use 美国英语用 chalkboard

双语例句