Anonymous Do they keep the subway waiting so that the interval between trains is equal and that the trains aren't too close to one another. This is the way I understand it. Anonymous I don't understand the use of interval here?
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AnonymousDo they keep the subway waiting so that the interval between trains is equal and that the trains aren't too close to one another.This is the way I understand it.
AnonymousI don't understand the use of interval here?An interval here could be a specific gap in space, or a gap in time.