Data is passed back and forth between tiers and components in the form of model objects.
数据将以模型对象得形式在层与组件之间来回传递。

Analysis of treatment data of chronic noninfectious diseases in hospitals of different tiers
慢性非传染性疾病在不同等级医院就医资料分析

We constructed two tiers of defence works. When the enemy attacked, we got into the tunnels.
我们挖两层工事, 敌人攻上来, 我们就进地道。

Tiers are numbered sequentially from top to bottom, starting with tier number1 as the top tier.
层是从作为顶层的层编号1开始，从上到下顺序编号的。

For instance, it may not be desirable or necessary to assert pictures belonging to middle tiers.
例如，断言属于中间层的图片可能是不希望或不必要的。

Contrast trim at neckline, straps, waist and front placket. Asymmetrical tiers throughout skirt.
对比领口，带阀，腰，前与门襟。在非对称层的裙子。

Logical tiers are mapped onto physical tiers as part of the deployment architecture of the application.
逻辑层作为应用程序部署体系结构的一部分射到物理层。

Remember, when you replace a single tier with two tiers, you arrange for those two tiers to trade information.
请记住，当用两层替换单个层时，将安排这两层交换信息。