the time of day the machine is operated.
A time machine is a futuristic device that allows you to travel forward in time and backward in time. It can be used to go back in time and go forward in time. This is why time machines are usually made of steel. It would seem that a time machine made of plastic is not as sturdy as steel, but it can be put into a time loop and go back to the beginning of the day, so a time machine made of plastic might be better.
This is a good point. The fact that a time machine requires a human to go back and forth in time, it would seem, might not be as convenient.
The time machine is a classic plot device in science fiction movies. The idea is that if you can get a bunch of people together and create a machine, you can travel through time and go back and forth through the past. Because it requires a bunch of people to go back and forth, you have to have some sort of mechanism that allows you to control the time machine. This is why the classic time machines in science fiction movies are not really all that useful.
