[zh] Add glossary/duration.md

Author: windsonsea

content/zh-cn/docs/reference/glossary/duration.md

@@ -0,0 +1,31 @@
+---
+title: Duration
+id: duration
+date: 2024-10-05
+full_link:
+short_description: >
+  以字符串形式指定的时间间隔，格式符合 Go 语言的
+  [time.Duration](https://pkg.go.dev/time)，
+  允许使用秒、分钟和小时等不同单位灵活地指定时间。
+aka:
+tags:
+- fundamental
+---
+<!--
+title: Duration
+id: duration
+date: 2024-10-05
+full_link:
+short_description: >
+  A time interval specified as a string in the format accepted by Go's [time.Duration](https://pkg.go.dev/time), allowing for flexible time specifications using various units like seconds, minutes, and hours.
+aka:
+tags:
+- fundamental
+-->
+
+<!--
+In Kubernetes APIs, a duration must be non-negative and is typically expressed with a suffix. 
+For example, `5s` for five seconds or `1m30s` for one minute and thirty seconds.
+-->
+在 Kubernetes API 中，duration 必须是非负的，通常带有后缀单位。
+例如，`5s` 表示五秒，`1m30s` 表示一分三十秒。