Kaitlin Hagan, another study leader, says earlier studies show that a person can use simple, low-cost methods to increase optimism.

这项研究的另一位负责人凯特琳·哈根(Kaitlin Hagan)表示，早期研究表明，人们可以通过简单、低成本的方式提升乐观。

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Carbonation method is one of the high efficiency and low cost methods to treat the oil residue.

碳化法是利用废气中的二氧化碳来处理石油碱渣，是一种高效且成本低廉的石油碱渣处理方法。

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As one part of Activities Based cost Methods, Activities Analysis Methods are relatively scientific and practical for cost-controlling.

作业成本法中的作业分析方法就是一种较为科学实用的成本控制方法。

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FAO official Rene Czudek says the main aim is to provide low-cost methods to deal with wild animals without harming them.

VOA: special.2010.07.27

And,friction stir welding uses fewer workers at less cost than other methods.

VOA: special.2009.12.30

These range from planting mangroves to increase water catchments in high flood regions to providing low-cost risk transfer methods to farmers in developing countries.

CNN: Risky business: insuring countries against climate catastrophe

From the biggest ad agencies in the world to the most cutting-edge digital idea shops and deliverers, digital media has become one of the most cost-effective methods of reaching an audience.

FORBES: Think More, Think Local

"Vivendi Universal considers this sudden withdrawal to have been motivated by Deutsche Telekom's wish to appropriate the shares of PTC at the lowest possible cost, using methods which Vivendi regards as unlawful, " said a statement on the media group's website.

BBC: NEWS | Business | Deutsche Telekom sued by Vivendi