Compost differs from mulch but it can be used as mulch.

VOA: special.2009.06.23

It can be used as a publishing medium and something that you can interact with, instead of something that is a burden to receive.

它可以用作一个发行媒介,成为你可以与之互动的东西，而不再是一个负担。

斯坦福公开课 - Twitter之父Jack.Dorsey演讲：好奇和灵感的力量课程节选

Enriched uranium can be used as fuel for nuclear energy as Iran says or it can be used for nuclear bombs.

VOA: special.2009.09.26

It can be given to children as young as one, which is earlier than vaccines currently used to fight meningitis epidemics in Africa.

VOA: special.2010.12.15

It can be used for two- way communication, such as between a ship and land.

VOA: special.2010.01.31