https://www.youtube.com/watch?v=X3G_P0EJcLU 0;18 cold front 寒冷前線
https://www.youtube.com/watch?v=wB5dHgln-5o 0;58 with the cold front heading towards the West
https://www.youtube.com/watch?v=ApEqnLNLu0c 2;20 it's an arctic cold front. この大寒波は北極からの寒帯前線のせいです。
練習問題解答
a-877 cold air front
a-3858 rain front