two weighted norm inequalities 双权模不等式
two-weight norm integral inequality 双权范数积分不等式
two parameter earthquake damages norm 双参数地震损坏准则
The introduction of new screen formats was put off for a quarter century, and color, though utilized over the next two decades for special productions, also did not become a norm until the 1950s.
新屏幕格式的引入被推迟了四分之一个世纪，而颜色尽管在接下来的二十年里被用于特制产品，它也是直到二十世纪五十年代才成为一种常态。
Mr Warner's proposal has attracted the support of two other Republicans, Maine's Susan Collins and Minnesota's Norm Coleman, and other Republicans have made their unhappiness felt.
华纳的提议得到了其他两位共和党人的支持，他们分别是缅因州的苏珊•柯林斯和明尼苏达州的诺姆•科尔曼，其他有些共和党人也表现出不满。
'we are looking at it through a prism of families today which consist of one or two children but if we look back a few years having a lot of children was the norm'.
人们现在这样想是由于现在家庭普遍只有一到两个孩子，而多年以前，一家有很多孩子是再正常不过的事了。
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