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在严寒的冬季，滑雪和溜冰是北方人喜欢的两项户外体育活动．又宽又长的滑雪板和又短又窄的冰刀，相映成趣．滑雪板和冰刀绝然不同的外形，是为了在不同的条件下，获得相同的效果——运动员高速运动．显而易见，滑雪的人脚踩又长又宽的滑雪板，是为了增大受力面积，减小压强，
Skiing and ice-skating are two outdoor sports activities that Northerners like during the harsh winter months. The wide and long skis and the short and narrow ice skates make a difference. Skis and ice skates have different shapes, in order to achieve the same effect under different conditions - the athletes exercise at high speed. Obviously, skiers have long and wide snowboards in order to increase the area and reduce the pressure.