diff --git a/item.go b/item.go
index 9647481..05117a3 100644
--- a/item.go
+++ b/item.go
@@ -41,6 +41,11 @@ func (b *Item[T]) Trans() (tb *Item[T]) {
 	return tb
 }
 
+// IsTrans whether this item has been marked as trans.
+func (b *Item[T]) IsTrans() bool {
+	return b.stat.isintrans()
+}
+
 // Unwrap use value of the item
 func (b *Item[T]) Unwrap() T {
 	if b.stat.hasdestroyed() {
diff --git a/pbuf/bytes.go b/pbuf/bytes.go
index 9d271d3..80ec79b 100644
--- a/pbuf/bytes.go
+++ b/pbuf/bytes.go
@@ -94,6 +94,9 @@ func (b Bytes) Copy() (cb Bytes) {
 
 // SliceFrom dat[from:] with Ref.
 func (b Bytes) SliceFrom(from int) Bytes {
+	if b.buf.IsTrans() {
+		return InvolveBytes(b.dat[from:]...)
+	}
 	nb := b.Ref()
 	nb.dat = b.dat[from:]
 	return nb
@@ -101,6 +104,9 @@ func (b Bytes) SliceFrom(from int) Bytes {
 
 // SliceTo dat[:to] with Ref.
 func (b Bytes) SliceTo(to int) Bytes {
+	if b.buf.IsTrans() {
+		return InvolveBytes(b.dat[:to]...)
+	}
 	nb := b.Ref()
 	nb.dat = b.dat[:to]
 	return nb
@@ -108,6 +114,9 @@ func (b Bytes) SliceTo(to int) Bytes {
 
 // Slice dat[from:to] with Ref.
 func (b Bytes) Slice(from, to int) Bytes {
+	if b.buf.IsTrans() {
+		return InvolveBytes(b.dat[from:to]...)
+	}
 	nb := b.Ref()
 	nb.dat = b.dat[from:to]
 	return nb
diff --git a/pbuf/pbuf_test.go b/pbuf/pbuf_test.go
index 9ca9ac4..fff855f 100644
--- a/pbuf/pbuf_test.go
+++ b/pbuf/pbuf_test.go
@@ -10,7 +10,7 @@ func TestBytes(t *testing.T) {
 	for i := 0; i < 4096; i++ {
 		b := NewBytes(i)
 		rand.Read(b.Bytes())
-		b.Destroy()
+		b.Trans().SliceFrom(0).SliceTo(i).Destroy()
 	}
 	runtime.GC()
 	out, in := bufferPool.p.CountItems()