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There are many characteristics that can be seen of useful information. Useful information is something that is helpful or relevant.
It was a useful object to use. It was not useful to the team to have to struggle with the new machine.
A: Most useful or actually the only time that it is useful is when it has reached its predictable reverse breakdown voltage.
Personally, I rely on robots to get to work. The signaling system in the subway is a form of feedback control--uses input from sensors to send signals to train operators. Many soldiers and police personnel are likely grateful for the innovations that have come in remotely controlled bomb squad robots. People who have benefitted from robotic prosthesis and remote surgery owe a great debt to robotic technology.
I can give you several sentences.Learning how to use words properly is useful.You should make yourself useful and help your aunt sweep the floor.Speaking English is a useful skill.