I believe in the story of the friendship that gradually. Which means we're not hot, and consciousness. Compare with the rush we can't run long distances for the first time, but they must be continuously accumulated distance.
I believe in the gradual friendship. This means we're headed and sober. Compared with the run we can go the distance in the first place, but the distance to be retained indefinitely.
I believe friendship slowly. Which means we're not hot and conscious. Compared to running we cannot run distance at first but must accumulate distances around.