I don't see the point in tampering with a system that's worked fine so far.我不明白一个系统运行得好好的，改它干吗。Someone has been tampering with the machine.有人乱动了这台机器。I don't want to be accused of tampering with the evidence.我不希望被人控告篡改证据。He has been tampering with her feelings.他一直在玩弄她的感情。