diff --git a/README.md b/README.md
index 1c7e181..5ce855d 100644
--- a/README.md
+++ b/README.md
@@ -59,11 +59,11 @@ go run main.go
   req := &gin.H{"amount": 30} // micro-service payload
 	// DtmServer is the address of DTM micro-service
 	saga := dtmcli.NewSaga(DtmServer, shortuuid.New()).
-		// add a TransOut subtraction，forward operation with url: qsBusi+"/TransOut", reverse compensation operation with url: qsBusi+"/TransOutCom"
+		// add a TransOut sub-transaction，forward operation with url: qsBusi+"/TransOut", reverse compensation operation with url: qsBusi+"/TransOutCom"
 		Add(qsBusi+"/TransOut", qsBusi+"/TransOutCom", req).
-		// add a TransIn subtraction, forward operation with url: qsBusi+"/TransIn", reverse compensation operation with url: qsBusi+"/TransInCom"
+		// add a TransIn sub-transaction, forward operation with url: qsBusi+"/TransIn", reverse compensation operation with url: qsBusi+"/TransInCom"
 		Add(qsBusi+"/TransIn", qsBusi+"/TransInCom", req)
-	// submit the created saga transaction，dtm ensures all subtractions either complete or get revoked
+	// submit the created saga transaction，dtm ensures all sub-transactions either complete or get revoked
 	err := saga.Submit()
 ```
 
diff --git a/helper/README-en.md b/helper/README-en.md
index 740ae92..4caed84 100644
--- a/helper/README-en.md
+++ b/helper/README-en.md
@@ -57,11 +57,11 @@ go run main.go
   req := &gin.H{"amount": 30} // micro-service payload
 	// DtmServer is the address of DTM micro-service
 	saga := dtmcli.NewSaga(DtmServer, shortuuid.New()).
-		// add a TransOut subtraction，forward operation with url: qsBusi+"/TransOut", reverse compensation operation with url: qsBusi+"/TransOutCom"
+		// add a TransOut sub-transaction，forward operation with url: qsBusi+"/TransOut", reverse compensation operation with url: qsBusi+"/TransOutCom"
 		Add(qsBusi+"/TransOut", qsBusi+"/TransOutCom", req).
-		// add a TransIn subtraction, forward operation with url: qsBusi+"/TransIn", reverse compensation operation with url: qsBusi+"/TransInCom"
+		// add a TransIn sub-transaction, forward operation with url: qsBusi+"/TransIn", reverse compensation operation with url: qsBusi+"/TransInCom"
 		Add(qsBusi+"/TransIn", qsBusi+"/TransInCom", req)
-	// submit the created saga transaction，dtm ensures all subtractions either complete or get revoked
+	// submit the created saga transaction，dtm ensures all sub-transactions either complete or get revoked
 	err := saga.Submit()
 ```
 
diff --git a/test/busi/quick_start.go b/test/busi/quick_start.go
index 2f33d72..729be30 100644
--- a/test/busi/quick_start.go
+++ b/test/busi/quick_start.go
@@ -61,11 +61,11 @@ func QsFireRequest() string {
 	req := &gin.H{"amount": 30} // load of micro-service
 	// DtmServer is the url of dtm
 	saga := dtmcli.NewSaga(dtmServer, shortuuid.New()).
-		// add a TransOut subtraction，forward operation with url: qsBusi+"/TransOut", reverse compensation operation with url: qsBusi+"/TransOutCompensate"
+		// add a TransOut sub-transaction，forward operation with url: qsBusi+"/TransOut", reverse compensation operation with url: qsBusi+"/TransOutCompensate"
 		Add(qsBusi+"/TransOut", qsBusi+"/TransOutCompensate", req).
-		// add a TransIn subtraction, forward operation with url: qsBusi+"/TransIn", reverse compensation operation with url: qsBusi+"/TransInCompensate"
+		// add a TransIn sub-transaction, forward operation with url: qsBusi+"/TransIn", reverse compensation operation with url: qsBusi+"/TransInCompensate"
 		Add(qsBusi+"/TransIn", qsBusi+"/TransInCompensate", req)
-	// submit the created saga transaction，dtm ensures all subtractions either complete or get revoked
+	// submit the created saga transaction，dtm ensures all sub-transactions either complete or get revoked
 	err := saga.Submit()
 
 	if err != nil {