Although iron and steel products are all around us, I do not know how they are formed into various form.
虽然我们的周围都有钢铁制品，我却不知道它们是怎么样加工成形的。
The little dune is formed with loose dry sand by wind.
这个小沙丘是由风吹来的干沙子形成的。
This university is a corporate body formed from several colleges.
这所大学是由几个不同学院组成的。
