nokia 1. May I ask if up and down are both ok to use/interchangeable? You may.
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nokia1. May I ask if up and down are both ok to use/interchangeable?You may. They are pretty much interchangeable, especially if the street is more or less flat. However, if you're actually traveling along a street that is rising, "up" is the much better choice, and vice versafor a descending street.
nokia2. Does "up/down" imp