He died, literally , at the chalkboard at age 83.他过世了, 83岁的时候, 在黑板前.Then one morning we were working math problems at the chalkboard.后来有一天早晨,我和玛丽在黑板上写下了数字题目.The map was drawn on chalkboard with ink - markers.那张地图用记号笔画在一块...

chalkboard的复数形式为：chalkboards...

chalkboard的音标：chalkboard的英式发音音标为：['tʃɔ:kbɔ:d]chalkboard的美式发音音标为：['tʃɔkbɔrd]...

n.黑板...