基于《中新天津生态城绿色建筑评价标准》的暖通空调设计_暖通空调在线 关键词：绿色建筑,暖通空调设计,强制项,优选项, [gap=286]Keywords：green building,HVAC design,mandatory item,preferential item,
基于16个网页-相关网页
Jazz强制项与其Helper对象之间的引用完整性，但是不强制项之间的引用完整性；也就是说，悬空项引用是允许的。
Jazz enforces referential integrity between an item and its helper objects, but not between items; i.e., dangling item references are allowed.
然而，19世纪的一项法律强制铁路公司每天开一趟便宜的火车，这种火车在每个车站都停，每英里只花一便士。
However, a law in the 19th century forced railway companies to run one cheap train a day which stopped at every station and cost only a penny a mile.
第二，缓存支持可以强制失效的过期依赖项。
Secondly, the Cache supports expiration dependencies that can force invalidation.
应用推荐