This may be done deliberately, for example, to slow the boatdown to prevent crossing the starting line too soon in a sail race.
这有可能是蓄意之举，例如在帆船赛中为防止抢跑而将船降速的一种办法。
3
From there it was almost nine hundred kilometers by boatdown the Yukon River to the town of Dawson were gold had been discovered. But there was no boat service.