The way people act in private is often quite different to how they act when in public.
人们私下的行为跟公共场合的行为是截然不同的。
He insisted that we all be in his office at one o'clock.
他要求大家一点钟到他的办公室。[大学英语四级]
Alf did this for over two years and his fellow dustmen kept his secret Alf's wife has never discovered that she married a dustman and she never will, for Alf has just found another job.