物理层将逻辑层中的组件分配到其部署的物理平台。

Physical tiers allocate the components in the logical tiers to the physical platform to which they are deployed.

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为组件分配DateService接口。

Assign the DateService interface to the component.

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Seam在为上下文组件分配的作用域的生命期内对该组件进行管理。

Seam manages its contextual components for the lifetime of the scope in which they are assigned.

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