Shells she sells on the seashore are seashells I am sure.
我敢肯定她在海边卖的贝壳是海贝。
The braying of an ass does not reach heaven.
驴子的叫声传不到天上。
People who work in offices are frequently referred to as white-collar workers' for the simple reason that they usually wear a collar and tie to go to work.