diff --git a/docs-en/07-develop/07-cache.md b/docs-en/07-develop/07-cache.md
index 13db6c363802abed290cfc4d4466d40e48852f3d..c99612ecfbf192d8ffb4e2edd33665ba9f994797 100644
--- a/docs-en/07-develop/07-cache.md
+++ b/docs-en/07-develop/07-cache.md
@@ -10,9 +10,9 @@ Caching the latest data provides the capability of retrieving data in millisecon
 
 The memory space used by TDengine cache is fixed in size, according to the configuration based on application requirement and system resources. Independent memory pool is allocated for and managed by each vnode (virtual node) in TDengine, there is no sharing of memory pools between vnodes. All the tables belonging to a vnode share all the cache memory of the vnode.
 
-Memory pool is divided into blocks and data is stored in row format in memory and each block follows FIFO policy. The size of each block is determined by configuration parameter `cache`, the number of blocks for each vnode is determined by `blocks`. For each vnode, the total cache size is `cache * blocks`. It's better to set the size of each block to hold at least tends of rows.
+Memory pool is divided into blocks and data is stored in row format in memory and each block follows FIFO policy. The size of each block is determined by configuration parameter `cache`, the number of blocks for each vnode is determined by `blocks`. For each vnode, the total cache size is `cache * blocks`.  A cache block needs to ensure that each table can store at least dozens of records to be efficient.
 
-`last_row` function can be used to retrieve the last row of a table or a STable to quickly show the current state of devices on monitoring screen. For example below SQL statement retrieves the latest voltage of all meters in Chaoyang district of Beijing.
+`last_row` function can be used to retrieve the last row of a table or a STable to quickly show the current state of devices on monitoring screen. For example the below SQL statement retrieves the latest voltage of all meters in Chaoyang district of Beijing.
 
 ```sql
 select last_row(voltage) from meters where location='Beijing.Chaoyang';