死人不会泄密；死无对证。
Dead men tell no tales.

秘密将岳飞等人杀死，死无对证，留下个千古谜案是最聪明的作法。
The secret flies Yue to wait for someone to kill, die to have no to the certificate and leave a historic riddle case is the most intelligent method.

必须要面对的一个问题是，很多人丢假币到钱箱中，而且是“死无对证”。
The bus operators have faced the problem of receiving spurious coins as drivers are unable to judge what passengers throw into money-collecting boxes.