N-VOC （对高级官员的尊称）阁下 You use expressions such as Your Excellency or His Excellency when you are addressing or referring to officials of very high rank, for example ambassadors or governors. （对高级官员的尊称）阁下 [politeness]
I am reluctant to trust anyone totally, Your Excellency.
我不想完全相信任何人，阁下。
His excellency the President will be waiting for you in the hall.