class board的用法和样例：
例句
- You needn't erase the backboard after class.
课下你不必擦黑板。 - The rates of exchange are on the board there.
兑换率写在那这的黑板上。
class board的相关资料：
临近单词
classact
class
Class-Vandemonde determinant
classified vector quantization
Classified Defense Information
class or representative action
classified financial statement
class-a transistor amplifier
class a single ended amplifier
classified telephone directory
Class contains a method called
Class contains a collection of
