| 1. | Zuber and her colleagues also analyzed mars ' s much larger northern polar cap
尤伯和她的同事也分析了火星上要大得多的北部极地冰冠。 |
| 2. | The antarctica icecap is a thick layer of ice and snow that buries most of the continent
南极洲的冰冠是由冰和雪组成的厚层，它覆盖了南极洲的大部分。 |
| 3. | The northern cap contains no more than one tenth the amount of water needed to fill an ancient ocean
北部冰冠的含水量只不过是注满一个远古海洋所需水量的1 10 。 |
| 4. | But the global surveyor also produced the first accurate measurement of the size of the northern cap - - and that was a surprise
全球监测机构还提出了第一种测量北部冰冠大小的方法一这才是令人。 |
| 5. | Zuber ' s results confirmed that the northern cap is composed entirely of water ice , in some areas interspersed with layers of windblown dust and sediment
尤伯的结论证实了北部冰冠完全是由冰水构成的，某些地区也点缀着由于风吹而堆积的层层的尘埃和沉渣。 |
| 6. | In addition , an incipient ice age ? marked by the appearance of small ice caps ? would probably have begun several thousand years ago in parts of northeastern canada
另外，很可能在数千年前，加拿大东北部便已开始一个新的冰期（可由小型冰冠的出现做为指标） 。 |
| 7. | The northern ice cap sits nestled within a deep depression that covers essentially the entire northern hemisphere of mars and drops in elevation as it nears the pole
北部冰冠位于基本覆盖了整个火星北半球的一个深奥的凹陷处的内部，在接近极地处，海拔下降。 |
| 8. | " there are no troughs of that kind in any of the ice caps on earth , " said global surveyor project scientist arden albee of caltech at the agu press conference
加利福尼亚理工学院的全球监测工程科学家阿登?阿尔比在美国地球物理学协会的记者招待会上说： “在地球的冰冠上没有类似的波谷。 |
| 9. | Every increase in concentration carries new risks , but avoiding that danger zone would reduce the likelihood of triggering major , irreversible climate changes , such as the disappearance of the greenland ice cap
浓度每增加一些，就可能隐藏著新的风险，但避开这个危险区段，引发不可逆的重大气候变迁（例如格陵兰冰冠消失）可能性就会降低。 |
| 10. | According to an assessment report published by the inter - governmental panel on climate change ipcc in 2001 , one of the consequences of global warming was the rise in sea level due to thermal expansion of the upper layer of the ocean and melting of polar ice caps and mountain glaciers , and it was estimated that the global mean sea level had risen by one to two millimetres per year in the 20th century . there are , however , considerable regional variation in the sea level change as global warming would affect atmospheric and oceanic circulations and hence the regional climate and sea level
根据政府间气候变化专业委员会ipcc在二一年发表的评估报告，全球变暖导致海水受热膨胀以及两极冰冠和雪山冰川融化，造成全球海平面上升，在二十世纪全球海平面平均每年上升了约一至二毫米，但区域性的差异相当之大，这主要是因为全球变暖影响了大气及海洋环流，引致区域性的天气及海平面变化。 |
