Men utilize this homing instinct to send messages on small pieces of paper that are fastened to the pigeon’s back or legs. Pigeons have been known to fly as fast as 75 miles an hour and to cover distances of 500 to 600 miles.
【正确答案】：男人利用这种回巢的本能，把小纸条绑在鸽子的背上或腿上，向它们传递信息。据了解，鸽子的飞行速度可达每小时75英里，飞行距离可达500至600英里。
