chalkboard的例句（chalkboard在句子中的用法）

• The map was drawn on chalkboard with ink - markers. 那张地图用记号笔画在一块黑板上.
• 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.
• He died, literally , at the chalkboard at age 83. 他过世了, 83岁的时候, 在黑板前.