問 : 一件厚上衣比較保暖, 還是三件薄上衣比較保暖？
Which is warmer, a thick coat or three thin clothes?
答 : 穿上三件上衣時, 外面和身體之間就有三層空氣牆壁。因為空氣傳温的功能較差, 所以如果身體和外界空氣之間, 隔的上衣數愈多, 體温就愈不會散發出去, 當然也就不感覺冷了。
If you wear three clothes, they create three air walls between your body and the outside air. Since air conducts heat poorly, the more layers of clothes you have between your body and the outside air, the less body heat will be lost, and you certainly won't feel cold.
經常下雪的地方, 房子的玻璃窗往往會設置兩層, 這樣可以形成空氣牆。
In those places where it snows very often, the house usually have two layers of windows to form an air wall.
