在许多情况下,作为在女孩的青春期之前,或在怀孕期间,哺乳或绝经期,这是正常的,也是所谓的生理闭经。
In many cases, as in girls before puberty, or during pregnancy, breastfeeding or the menopause, this is normal and is called physiological amenorrhoea.
实时数据库系统的事务调度一般只考虑事务的截止期,但是,在很多情况下,它还与数据截止期直接相关。
Generally the deadline of transaction is only considered in dealing with real-time transaction scheduling, but in many cases, scheduling method is directly related with data deadline.
应用推荐