因为prep语法笔记里面乱解释 One report concludes that many schools do not have, or likely to have, enough computers to use them effectively. 这里 , or likely to have, 有两个逗号隔开,是插入语,所以才用nor are they likely to have 如果是or就应该 One report concludes that many schools do not have or are likely to have enough computers to use them effectively.