Don't choose the first or second floor.

别去一楼二楼。

youdao

I live on the second floor, and he lives on the first floor.

我住在二层，他住在一层。

youdao

First, they visited our classroom on the second floor at two fifteen.

首先他们在两点十五分参观我们的教室。

youdao

I live on the second floor, he lives on the first floor.

我住在二层，他住在一层。

普林斯顿公开课 - 人性课程节选

The man who was rescued by firefighters made his way from a second floor flat to a first floor window.

BBC: Man rescued from blaze

"If you don't like the view on the first floor, go look out the second floor, " she said.

WSJ: Dunes vs. property rights in storm-battered NJ

This happened -- his first stop in the second-floor ICU was in her room, spent about 10 minutes there with members of her family, with her husband.

WHITEHOUSE: Press Briefing