They hesitated on the bank for an instant that was only a break in a musical rhythm, a change of beat, then plunged smoothly into the swift arm of river between mainland and island.

他们在岸边犹豫了片刻，那只是音乐节奏的中断，节拍的变化，然后平稳地跳入大陆和岛屿之间的河流迅速的支流中。