zh-trans: add namespace.md (#11256)

* zh-trans: add namespace.md

zh-trans: add namespace.md

* Update namespace.md

content/zh/docs/reference/glossary/namespace.md

@@ -0,0 +1,41 @@
+---
+title: 命名空间
+id: namespace
+date: 2018-04-12
+full_link: /docs/concepts/overview/working-with-objects/namespaces
+short_description: >
+  命名空间是 Kubernetes 为了在同一物理集群上支持多个虚拟集群而使用的一种抽象。
+
+aka: 
+tags:
+- fundamental
+---
+
+<!--
+---
+title: Namespace
+id: namespace
+date: 2018-04-12
+full_link: /docs/concepts/overview/working-with-objects/namespaces
+short_description: >
+  An abstraction used by Kubernetes to support multiple virtual clusters on the same physical cluster.
+
+aka: 
+tags:
+- fundamental
+---
+-->
+
+<!--
+ An abstraction used by Kubernetes to support multiple virtual clusters on the same physical {{< glossary_tooltip text="cluster" term_id="cluster" >}}.
+-->
+
+命名空间是 Kubernetes 为了在同一物理集群上支持多个虚拟集群而使用的一种抽象。
+
+<!--more--> 
+
+<!--
+Namespaces are used to organize objects in a cluster and provide a way to divide cluster resources. Names of resources need to be unique within a namespace, but not across namespaces.
+-->
+
+命名空间用来组织集群中对象，并为集群资源划分提供了一种方法。同一命名空间内的资源名称必须唯一，但跨命名空间时不作要求。