I think peter lives two floors under mary----英语改错

under--below
below,用法接近于ABOVE
ad.
1.在下面;到下面;在下方;在楼下;在甲板下
From the hill top we could see the plains below.
从山顶上我们可以看到山下的大平原.
2.在下级;在某一级以下
I mean officers of the rank of major and below.
我是说少校及少校以下的军官们.
3.在水面(或地面)下
The miners are working below.
矿工们在地下干活.
4.在本页下面(或下面一页)
See p.17 below.
见下面的第十七页.
5.【书】在尘世上
6.【口】(温度)在零下
7.在下游

two--second

支持将under改为below
其题意是Peter住在mary两层下

two--the second