Update key_concepts.md

2023-04-13 01:43:34 +08:00 · 2023-04-13 01:43:34 +08:00 · 3f5e48cc3f
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 # Key Concepts

-Lets looks at some of the key concepts when we talk about messaging queue system
+Lets looks at some of the key concepts when we talk about messaging system


 ### Delivery guarantees