重建过去的气候变化是极其困难的，因为在欧洲和北美，几个世纪前才开始系统的天气观测。
Reconstructing the climate changes of the past is extremely difficult, because systematic weather observations began only a few centuries ago, in Europe and North America.
在欧洲和北美，研究基金逐渐的被削减。
Research funding is being squeezed in Europe and North America.
该车将于今年年底在欧洲和北美几乎同时投入生产，经销商有望在2011年初拿到现车。
Production of the cars is to begin almost simultaneously in Europe and North America late this year, with vehicles likely to reach dealerships in early 2011.
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