It seems hard to believe that what is now an international sport and multimillion-dollar industry evolved from origins as humble as hitting a pebble around sand dunes with a stick.

• 很难相信如今这个价值高达数**美元的国际性工业，是从随便拿根棍子，在沙丘上挥打鹅卵石这种微不足道的运动发展起来的。