We communicated mainly by signs, gesticulation, and mime.

我们主要通过信号、手势和哑剧动作来交流。

《柯林斯英汉双解大词典》

Recycling helps the environment mainly by saving energy.

回收利用主要是通过节约能源来改善环境。

youdao

In the early days, the Internet was used mainly by scientists to communicate with other scientists.

在早期，互联网主要被科学家用来与其他科学家交流。

youdao

In nineteen eighty-three, the project was turned into an independent bank owned mainly by its borrowers.

VOA: special.2010.06.16

Actually he gained power in Rome mainly by military might, by kind of making the Senate nervous and winning a few battles, and that was against the law.

事实上他在罗马提升势力，是由于强大军事实力，而且赢了几场硬仗战争，让元老院感到不安，这是违反法律的。

耶鲁公开课 - 新约课程节选

This means that all the area surrounding that Fairview Gardens was mainly farmland back in the 1950s, all growing food, probably a fair amount of it being eaten locally by people.

美景花园的整个周边地区,在上世纪50年代基本上都是耕地,都长着农作物,其中很大一部分被当地人消费掉

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Also noticeable is the strong growth of non-Christian groups, which again is explained mainly by immigration.

BBC: The changing face of the average Aussie

However, that was started and helped along mainly by private entrepreneurs with minimal governmental money.

FORBES: Magazine Article

But production, mainly by two South African outfits in joint ventures with the Zimbabwean government, continued.

ECONOMIST: Zimbabwe and its diamonds