Why is the bootstrap grid not working?

Question

css

whatever examples I would use, columns instead of lining up like this
pro-cod.ru/uroki-bootstrap-3-0-dlya-nachinayushhix...
line up one under the other. I don't know what the problem is, I can't find the answer on the Internet.
Lorem Ipsum I tried both md and lg and xs and sm, for some reason they all work the same for me, the columns are not lined up next to each other but under each other

Answer 1

you are probably doing something wrong
jsbin.com/sasoge/1/edit?output throw off
an example of your code