平底雪橇

例句：

1. 1. They went on a winter vacation to the mountains and enjoyed themselves by skiing and snowshoeing.
   他们去山区度寒假，滑雪和雪橇滑冰玩得很开心。
2. 2. The children were thrilled when they saw their parents building an igloo in the snow.
   孩子们看到父母在雪中建造了一个雪屋时非常兴奋。
3. 3. During the cold winter season, snowshoeing is a popular outdoor activity for many people.
   在寒冷的冬季，许多人喜欢进行雪橇运动作为户外活动。