secondary cold front

• 次冷锋,副冷锋

secondary cold front的用法和样例：

例句

1. And I learn that cold front will hit our town.
   我听说冷锋会袭击我们的城镇。
2. A cold front is the forward edge of a mass of moving cold air.
   冷锋就是移动的冷空气团的前锋。