Each database row may use up to 14 bytes at the end of the row for row versioning information. The row versioning information contains the transaction sequence number of the...

i got a answer:

It's the 14-byte versioning tag [timestamep, pointer into tempdb].

but i never set allow_snapshot_isloation on or read_committed_snapshot on

you guys did a big deal for me ,thanks ...

ahaha

i'll have a try