[zh-cn]sync pod-disruption-budget

Signed-off-by: xin.li <xin.li@daocloud.io>

content/zh-cn/docs/reference/glossary/pod-disruption-budget.md

@@ -4,7 +4,8 @@ title: Pod Disruption Budget
 full-link: /zh-cn/docs/concepts/workloads/pods/disruptions/
 date: 2019-02-12
 short_description: >
- Pod Disruption Budget 是这样一种对象：它保证在主动中断（ voluntary disruptions）时，多实例应用的 {{< glossary_tooltip text="Pod" term_id="pod" >}} 不会少于一定的数量。
+  Pod Disruption Budget 是这样一种对象：它保证在出现主动干扰（Voluntary Disruption）时，
+  多实例应用的 Pod 不会少于一定的数量。
 
 aka:
  - PDB
@@ -22,7 +23,7 @@ title: Pod Disruption Budget
 full-link: /docs/concepts/workloads/pods/disruptions/
 date: 2019-02-12
 short_description: >
- An object that limits the number of {{< glossary_tooltip text="Pods" term_id="pod" >}} of a replicated application, that are down simultaneously from voluntary disruptions.
+ An object that limits the number of Pods of a replicated application that are down simultaneously from voluntary disruptions.
 
 aka:
  - PDB
@@ -37,13 +38,14 @@ tags:
 <!--
  A [Pod Disruption Budget](/docs/concepts/workloads/pods/disruptions/) allows an 
  application owner to create an object for a replicated application, that ensures
- a certain number or percentage of Pods with an assigned label will not be voluntarily
- evicted at any point in time.
+ a certain number or percentage of {{< glossary_tooltip text="Pods" term_id="pod" >}}
+ with an assigned label will not be voluntarily evicted at any point in time.
 
  Involuntary disruptions cannot be prevented by PDBs; however they 
  do count against the budget.
 -->
  [Pod 干扰预算（Pod Disruption Budget，PDB）](/zh-cn/docs/concepts/workloads/pods/disruptions/)
- 使应用所有者能够为多实例应用创建一个对象，来确保一定数量的具有指定标签的 Pod 在任何时候都不会被主动驱逐。
+ 使应用所有者能够为多实例应用创建一个对象，来确保一定数量的具有指定标签的
+ {{< glossary_tooltip text="Pod" term_id="pod" >}} 在任何时候都不会被主动驱逐。
  <!--more--> 
 PDB 无法防止非主动的中断，但是会计入预算（budget）。