1. He was seen stamping his feet to try and keep warm in the cold weather.
在寒冷的天气里，他被发现踩踏脚来保持温暖。

2. The passport officer stamped my passport with the entry visa.
护照官员用印章给我的护照盖上入境签证。

3. The protestors were stamping their feet and shouting slogans outside the government building.
抗议者们在政府大楼外跺脚示威并高呼口号。