"Ground floor" 是英国表示第一层的说法。其来源是因为这一层靠近地面，所以称为 "ground floor"。
例句:
"My office is on the ground floor." (我的办公室在第一层。)
"Can you meet me at the entrance of the building on the ground floor?" (你能在大楼的一楼入口见我吗？)
"The ground floor of the museum has a gift shop." (博物馆的一楼有礼品店。)