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。
I tried to telephone you but I couldn't get through.
我试着打电话给你,但都没有打通。
The captain knew that another attempt would be made later, for the sunken ship he was trying to find had been carrying a precious cargo of gold bullion.