The main reasons for city dwellers to commute on a daily basis is not just for work but also for study, business, shopping and their social life.

城市居民每天通勤的主要原因不仅是工作，还包括学习、商务、购物和社交生活。

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Smoking is one of the main reasons for fires.

吸烟是导致火灾的主要原因之一。

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Another survey gave climate conditions, homesickness, and "the stark appearance of the Australian countryside" as the main reasons for leaving.

另一项调查将气候条件、乡愁和“澳大利亚乡村荒凉的面貌”作为离开的主要原因。

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The United Nations agency gives two main reasons for what it calls "the cost of coercion."

VOA: special.2009.06.08

It doesn't work that way for a variety of reasons, but the main reason is that you want some decisions to be made at each space between two cells.

这出于很多原因,但主要的原因是,在每个细胞间隙,都需要决定信息是否继续传递

耶鲁公开课 - 生物医学工程探索课程节选

The report identifies five main reasons for losses in biodiversity.

VOA: special.2010.05.25

One of the main reasons for the slow progress is the difficulty of finding premises.

ECONOMIST: Free schools

It was one of his main reasons for proposing the Rio summit, in 1997.

ECONOMIST: French lessons

There are two main reasons for the muted response of unemployment to so severe a downturn.

ECONOMIST: Why there are renewed worries about unemployment