Flying fish can whip their tailsback and forth with tremendous speed to propel themselves out of the water.
飞鱼能够极速来回摇摆鱼尾，将自己推出水面。
2
Their high, narrow tails with swept-back tips are almost perfectly adapted to provide propulsion with the least possible effort.
它们又长又细的尾巴配合后掠式的襟翼，完美地适用于最省力的方式提供推动力。
3
Sometimes Indians would come to see me; and, though my acquaintance with them was but slight, when they rose to leave I felt inclined to hold them back by their coat-tails.