Update configure-dns-cluster.md

apply suggestion from tengqm

Author: guzj11

content/zh/docs/tasks/access-application-cluster/configure-dns-cluster.md

@@ -16,12 +16,13 @@ content_type: concept
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 Kubernetes offers a DNS cluster addon, which most of the supported environments enable by default. In Kubernetes version 1.11 and later, CoreDNS is recommended and is installed by default with kubeadm.
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-Kubernetes 提供 DNS 集群插件，大多数支持的环境默认情况下都会启用。在Kubernetes 1.11及其以后版本中，推荐使用CoreDNS，CoreDNS默认与kubeadm一起安装。
+Kubernetes 提供 DNS 集群插件，大多数支持的环境默认情况下都会启用。在 Kubernetes 1.11 及其以后版本中，推荐使用 CoreDNS，CoreDNS 默认与 kubeadm 一起安装。
 
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 For more information on how to configure CoreDNS for a Kubernetes cluster, see the [Customizing DNS Service](/docs/tasks/administer-cluster/dns-custom-nameservers/). An example demonstrating how to use Kubernetes DNS with kube-dns, see the [Kubernetes DNS sample plugin](https://github.com/kubernetes/examples/tree/master/staging/cluster-dns)
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-获取更多关于如何为Kubernetes集群配置CoreDNS的信息，参阅 [定制DNS服务](/docs/tasks/administer-cluster/dns-custom-nameservers/)。演示如何利用kube-dns配置kubernetes DNS的例子，参阅 [Kubernetes DNS插件示例](https://github.com/kubernetes/examples/tree/master/staging/cluster-dns)。
+获取更多关于如何为 Kubernetes 集群配置 CoreDNS 的信息，参阅 [定制 DNS 服务](/docs/tasks/administer-cluster/dns-custom-nameservers/)。
+演示如何利用 kube-dns 配置 kubernetes DNS 的例子，参阅 [Kubernetes DNS 插件示例](https://github.com/kubernetes/examples/tree/master/staging/cluster-dns)。