如果我们让三个气团(一冷，一暖又一冷的)依次由西向东运动，则会出现两个锋。
Two fronts will exist if we have three air masses, a coal, a warm, and a cold, moving from west to east one after another.
锋或锋面是指冷暖气团之间的过度带。
A front is a transition area between the cold and warm air masses.
不管有没有梅雨锋的出现，从印度到库克群岛，日食路径都已嵌入潮湿和不稳定的气团中。
With or without the presence of the mei-yu front, the eclipse path is embedded in a humid and unstable airmass from India to the Cook Islands.
应用推荐