The key implication of the research, the scientists say, is that access to fossil fuels must somehow be rationed and eventually turned off, if the 2c target is to be met.

科学家们表示，该项研究的重要含义在于，为了防止气温升高2摄氏度，化石燃料必须限量使用，并最终放弃。

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A key test of the biological hypothesis for ALH 84001 is the formation temperature of the carbonates that contain the putative fossil evidence.

对84001生命假说来说，一个重要的测试是这个化石里碳酸盐的形成温度。

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Pseudogene is regarded as biologic fossil in genome evolution and key in research of biologic evolution and dynamic genome because it keeps information of ancient genes.

假基因保留了远古基因的信息，被视为基因组进化中的分子化石，成为研究生物进化和动态基因组的重要线索。

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The decline in the production of the fossil fuel has hurt key consumers such as power and fertilizer firms that have been forced to raise their imports.

WSJ: Cairn India to Invest $2 Billion to Raise Output

New fossil evidence seems to confirm that a key ancestor of ours could walk upright consistently - one of the major advances in human evolution.

BBC: Fossil find puts 'Lucy' story on firm footing

The key development, says Professor Kemp, alongside a move away from fossil fuels, is a so-called "smart grid".

BBC: Promise, but daunting challenges for electric cars