This minimizes the entire life cycle carbon footprint of a product, providing a long-term emissions reduction solution, rather than looking at just one part of the cycle such as airfreight.

这便把一种产品整个生命周期中的碳排放减到了最低，由此提供了长期减少碳排放的方案。 这比只盯住产品周期中的一环——比如货物空运——要有效很多。

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Abstract: This paper calculates the life cycle carbon emissions of a residential building in hot summer and warm winter area, and analyzes the building life cycle impact on carbon emissions targets.

摘要：对夏热冬暖地区某居住建筑的生命周期碳排放量进行计算，并分析建筑生命周期内碳排放指标的特征。

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The three most important nutrient recycles are the nitrogen cycle, the carbon cycle and the one we are going to talk about today, the Phosphorus cycle.

这三种最重要的营养循环包括氮循环、碳循环和我们今天要讲的磷循环。

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Life in the sea, after all, supports the basic processes that we all take for granted: the water cycle, the oxygen cycle, the carbon cycle, and much more.

CNN: An SOS on World Oceans Day: Save our seas, save ourselves

Oceans are considered to be one of the planet major players in the global carbon cycle, but the carbon uptake in the region where the eruption occurred has limited capacity.

BBC: Iceland volcano ash cloud triggers plankton bloom

Researchers think that the carbon cycle turns over about 330 billion tonnes of carbon dioxide each year.

ECONOMIST: Two new satellites will monitor carbon-dioxide emissions