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....
显然需要有更加统一的单位制表方法.The need for a more uniform system of expression is evident.这种过程随着技术的自然发展, 称为“制表”.The process, as a natural outgrowth of the technology, was called tabbing or setting tabs.无法在此制表位或位置之后创建任何制表位.Cannot crea...