Current efforts in malaria control are mainly based on the use of insecticide sprays and treated bed nets.

VOA: special.2009.12.22

Our bodies have mechanisms like that, that mainly use the principle of negative feedback in order to control the parameters that are important for life within a certain range.

我们的身体有着与之类似的机制,主要依靠负反馈原理来,将与生命息息相关的指标控制在一定范围

耶鲁公开课 - 生物医学工程探索课程节选

You can use them mainly to soften your speech.

你可以用它们来柔化你的言辞。

Would you 课堂 - SpeakingMax英语口语达人

Nothing much can stop it. Americans still use the expression "to bulldoze" but mainly in political situations.

VOA: special.2009.02.15

It is also the first vaccine designed mainly for use in Africa.

VOA: special.2010.04.20

These are smaller, simpler machines designed mainly for Internet use.

VOA: special.2009.07.17

Most scientists believe the warming trend is mainly caused by human activity, especially the use of fossil fuels and the cutting down of forests.

VOA: standard.2009.12.09