[zh-cn] Sync concepts/workloads/pods/_index.md

Signed-off-by: yanggang <gang.yang@daocloud.io>

content/zh-cn/docs/concepts/workloads/pods/_index.md

@@ -58,15 +58,11 @@ for debugging if your cluster offers this.
 ## 什么是 Pod？   {#what-is-a-pod}
 
 <!--
-While Kubernetes supports more
-{{< glossary_tooltip text="container runtimes" term_id="container-runtime" >}}
-than just Docker, [Docker](https://www.docker.com/) is the most commonly known
-runtime, and it helps to describe Pods using some terminology from Docker.
+You need to install a [container runtime](/docs/setup/production-environment/container-runtimes/)
+into each node in the cluster so that Pods can run there.
 -->
 {{< note >}}
-除了 Docker 之外，Kubernetes 支持很多其他{{< glossary_tooltip text="容器运行时" term_id="container-runtime" >}}，
-[Docker](https://www.docker.com/) 是最有名的运行时，
-使用 Docker 的术语来描述 Pod 会很有帮助。
+为了运行 Pod，你需要提前在每个节点安装好[容器运行时](/zh-cn/docs/setup/production-environment/container-runtimes/)。
 {{< /note >}}
 
 <!--