Update 06-subscribe.mdx

docs-cn/04-develop/06-subscribe.mdx

@@ -177,19 +177,19 @@ $ taos
 ### 准备数据
 
 ```sql
-# 创建 power 库
+# create database "power"
 taos> create database power;
-# 切换库
+# use "power" as the database in following operations
 taos> use power;
-# 创建超级表
+# create super table "meters"
 taos> create table meters(ts timestamp, current float, voltage int, phase int) tags(location binary(64), groupId int);
-# 创建表
+# create tabes using the schema defined by super table "meters"
 taos> create table d1001 using meters tags ("Beijing.Chaoyang", 2);
 taos> create table d1002 using meters tags ("Beijing.Haidian", 2);
-# 插入测试数据
+# insert some rows
 taos> insert into d1001 values("2020-08-15 12:00:00.000", 12, 220, 1),("2020-08-15 12:10:00.000", 12.3, 220, 2),("2020-08-15 12:20:00.000", 12.2, 220, 1);
 taos> insert into d1002 values("2020-08-15 12:00:00.000", 9.9, 220, 1),("2020-08-15 12:10:00.000", 10.3, 220, 1),("2020-08-15 12:20:00.000", 11.2, 220, 1);
-# 从超级表 meters 查询电流大于 10A 的记录
+# filter out the rows in which current is bigger than 10A
 taos> select * from meters where current > 10;
            ts            |    current   |    voltage   |  phase |         location          |   groupid   |
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