Orange flames were already licking around the foot of the stairs.橙色的火焰已燃至楼梯底部。She paused at the foot of the stairs.她在楼梯底部停了下来。David called to the children from the foot of the stairs.戴维在楼梯下面喊孩子们。The guest came to the foot of the stairs and hemmed.客人走到楼梯脚边，轻咳一声。He walked to the foot of the stairs.他走到楼梯下面。