一、英譯中：請將下列英文譯為正確、通順且前後連貫的中文。注意：英文中畫底線標示的字、詞都需在對應的中文翻譯部分以底線顯示。畫底線的字、詞將加重計分。（20 分）  For most of the last two thousand years, the Arctic slowly cooled, a consequence ofvariations in the Earth’s orbit. But over the last century, the cooling abruptly reversed, andtemperatures in the region are now the highest they have been for 2,000 years, accordingto scientists. Researchers in the United States say that it is one of the clearest signs yet thathuman activity is warming the planet.