Update labels.md

content/zh/docs/concepts/overview/working-with-objects/labels.md

@@ -239,7 +239,7 @@ Similarly the comma separator acts as an _AND_ operator. So filtering resources
 The _set-based_ label selector is a general form of equality since `environment=production` is equivalent to `environment in (production)`; similarly for `!=` and `notin`.
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 _基于集合_ 的标签选择算符是相等标签选择算符的一般形式，因为 `environment=production`
-等同于 `environment in（production`；`!=` 和 `notin` 也是类似的。
+等同于 `environment in（production）`；`!=` 和 `notin` 也是类似的。
 
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 _Set-based_ requirements can be mixed with _equality-based_ requirements. For example: `partition in (customerA, customerB),environment!=qa`.