Billy hit me, so I give him back tit for tat.
比利打了我，所以我也以牙还牙打了他。
I told her if she did me any harm I would return tit for tat.
我告诉她，如果她伤害我，我会对她以牙还牙。
I didn't invite Jane to my party because she didn't invited me to hers. It was just tit for tat.
我没有邀请简参加我的聚会，因为她没有邀请我参加她的聚会。还不过是一报还一报。
