The results show that crestspeed changes with the depth of waters far more complicatedly than the phase speed does:furthermore, it changes with the slope of the bottom.
结果表明,峰速不仅与水底坡度有关,而旦随水深的变化较相速复杂。
2
Just before you crest a hill or reach the end of a speed interval, your lungs go into overdrive.
当你爬到山顶或即将到达最快速度之前,你的肺就会进入高速运转。
3
Speed(S):the distance the crest moves forward per second.