Update docs-2.0/1.introduction/3.nebula-graph-architecture/4.storage-…

…service.md

Co-authored-by: abby.huang <[email protected]>

docs-2.0/1.introduction/3.nebula-graph-architecture/4.storage-service.md

@@ -250,7 +250,7 @@ To avoid split-brain, when members in a Raft Group change, an intermediate state
 
 ## Cache
 
-The cache management of RocksDB can not caching vertex or edge as required, Nebula Graph implemented storage cache management itself, users can set the storage cache size, content, etc. For more information, see [Storage cache configurations](../../5.configurations-and-logs/1.configurations/4.storage-config.md).
+The cache management of RocksDB can not cache vertices or edges on demand. Nebula Graph implements its own cache management for Storage, allowing you to set the storage cache size, content, etc. For more information, see [Storage cache configurations](../../5.configurations-and-logs/1.configurations/4.storage-config.md).
 
 ## Differences with HDFS