黑板擦干净了.The blackboard has been wiped clean.老师建议我们课后把黑板擦了.The teacher suggested that we ( should ) clean the blackboard after class.你可以用黑板擦把粉笔印擦掉.You can rub out the chalk marks with the eraser....
我们相信在取消种族隔离的学校就读的学生会有更宽容的态度。We believe that pupils of integrated schools will have more tolerant attitudes.巴西恢复了与南非的外交关系，以示对其采取措施结束种族隔离的正式认可。Brazil normalised its diplomatic relations with South Africa in recognition of ...