当天第三次：给家长发签名报告-第二天要将家长签名后的报告带回学校。

Third time in one day: Refocus form - need to be signed by parent and returned the next day.

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本文依据IPCC第三次评估报告与国内外最新的研究成果，说明气候变暖的可能趋势以及对生态系统和社会经济的影响。

Firstly, IPCC TAR and the state of the art scientific advances in CO_2 studies are referred to present the possible trend of climate change in the future, the impact on ecosystem and socio-economy.

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