Here in Japan, we're very familiar with supermarkets because many of us have to go to them daily.
There are some larger supermarkets here, especially in rural areas, but most are small inside and out.
Ameican supermarkets on the other hand, are almost always huge, and have very large parking areas too.
It wasn't always so. When I worked at my local market as a teenager, it was about the size of a Japanese supermarket.
During the 1980s and 90s, though, supermarkets and other shops got bigger and bigger in an atempt to offer as a big variety of goods as sossible.
Most people in the US go to the market only once or twice a week, usually on weekends. They buy many bags of food at one time, carry them home in their big cars and store the stuff in their big kitchens... (G.K)
especially in rural areas 特に田舎では
most are small inside and out 大部分は内側も外側も（何もかも）小さい
on the other hand 一方では
almost always ほとんど必ず
as a teenager 十代の時
in an attempt to 〜 〜しようとして