Fertilizer nitrogen is one of the major sources of nitrate.

而硝酸盐的一个主要来源是化学肥料。

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These rules have been effective in finding the major sources of portability problems in these files.

这些规则在查找这些文件中的移植问题的主要根源方面是非常有效的。

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Most of the time, it's the major sources of stress that lead to job burnout and health problems.

多数时候，导致工作中精力枯竭和引起健康问题的是那些压力的主要源头。

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The major sources of revenue from college football and basketball come from ticket sales, alumni, and TV money.

FORBES: The Right Way to Compensate College Athletes

The on-going transformation in microfinance means grants and subsidies are a thing of the past and commercial sources of funding will continue to be the major source of funding.

FORBES: Opportunity Africa: How One Social Venture Is Crowdsourcing the For-Profit Finance Model

Lastly, we have to face the fact that there are major sources of emissions and there are minor sources.

FORBES: Moving Beyond The Symbolism Of Earth Hour