The pike lives mainly in large rivers and lakes.

梭鱼主要生活在大的江河湖泊里。

《柯林斯英汉双解大词典》

He worked mainly in New York City where living space is notoriously at a premium.

他主要在纽约市工作，那里的生存空间出了名地昂贵。

《柯林斯英汉双解大词典》

Restaurants were mainly in cities.

餐馆主要在城市。

youdao

In September, NASA scientists had announced the discovery of water molecules mainly in the moon's extreme northern and southern areas.

VOA: special.2009.12.30

and I specialized mainly in control systems.

主修控制系统。

在学校的经验 - SpeakingMax英语口语达人

A group of scientists, mainly in Boston found, importantly, that they could cultivate the polio virus, the disease causing polio virus; they could cultivate it in cell culture.

在波士顿有一队科学家有了重大发现,他们可以培养脊髓灰质炎病毒,也是就引发小儿麻痹症的病毒,他们可以通过细胞培养来孵育这种病毒

耶鲁公开课 - 生物医学工程探索课程节选

It's been out there for at least seven years, maybe 10 years, mainly in hospitals.

NPR: Tracking a New Strain of Drug-Resistant Staph

For China's banks the lessons lie mainly in the rapid fall, rather than the slow rise.

ECONOMIST: Japanese banks

It was mainly in the dot-com boom of the 1990s when homes got massive.

WSJ: A Silicon Valley Contractor Spills His Secrets