clean off a blackboard的意思|示意

把黑板擦干净 ... clean off清除 clean off a blackboard把黑板擦干净 clean out清理,清除,除掉 ...

擦去黑板上的字 clean+off+a+blackboard是什么... ... clean off a blackboard 擦去(拭去)黑板上的字 He bit off a large piece of the apple. 他咬下一大块苹果。 He cut off a bunch of grapes to entertain us. 他剪下一串葡萄招待我们。 ...