When I arrived at 2:30 a.m., the building was dark except for a single light in a ground floor window.

我到的时候是凌晨2：30，那幢房子里黑漆漆的，只有底楼的窗户边还留着一盏灯。

youdao

The lift creaked to a halt at the ground floor.

电梯嘎吱一声停在了底楼。

《柯林斯英汉双解大词典》

A supplier wants to get in on the ground floor and grow with the business.

一个供应商想一开始就加入并随着生意的扩大而发展。

《柯林斯英汉双解大词典》

Old Behrman was a painter who lived on the ground floor of the apartment building.

VOA: special.2009.08.01

But even if you do survive-- let's the ground floor-- even if you do survive, you would lead a life of constant frustration-- refusing to accept something that is there whether you like it or not.

即使你幸存下来-,比如你在一楼-,就算你真得幸存下来，你的生活将是处处受挫-,拒绝接受现实事物,不论你喜欢与否。

哈佛公开课 - 幸福课课程节选

The fire started in a ground floor bathroom, but the smoke had made its way throughout the building, said the officer.

BBC: Man rescued from blaze

Upon landing, a waiting bus takes them to a luxury hotel, where porters pile their bags into a ground floor meeting room or take them right to the players' rooms upon request.

FORBES: Magazine Article

In the tiny bedroom they share in a ground floor flat, 13-year-old Lauren Fick is trying to finish her homework on her bed, as her two older brothers rub shoulders at the computer.

BBC: Can the gangs of Cape Town be talked out of violence?