I saw her pulling three children through the snow on a sledge.我看到她用雪橇拉着3个孩子穿过雪地。
The sledge ran smoothly over the frozen snow.雪橇在冰冻的雪面上平稳地滑行。
Trekking through the snow with a sledge.拖着雪橇在雪地里跋涉。