a useful piece of information的用法和样例：
- It seems that the most useful piece of information a CISO can have is how to get to the board member, the CEOs or the CFOs, and make a case in their language.
- He is reading a piece of information.
- a useful piece of equipment for the kitchen
- The politician tried to suppress that piece of information .
- You have received an invaluable piece of information!