This exercise gives coaches a good indication of each oarsman’s boat-moving ability—and of the relative speed of combinations of rowers.
通过这个过程，教练可以大体得知船员的划船能力以及和其他组员组合后的相对速度。
2
Now one sunshiny day the Doctor and Dab-Dab were walking up and down on the ship for exercise; a nice fresh wind was blowing the boat along, and everybody was happy.