You would see unreinforced masonry buildings start to collapse.

您会看到未加固的砖石建筑开始倒塌。

The most dangerous buildings that we're concerned about are the unreinforced masonry building.

- 我们关注的最危险的建筑是未加固的砖石建筑。

And there are a lot of these unreinforced masonry buildings, or URMs for short, in our cities.

- 在我们的城市中有很多这些未加固的砖石建筑，简称 URM。