这种差别使得卫星能够获取整年的海冰记录，除非出现云层遮蔽或极夜的月份。
This difference allows the satellite to capture a year-round sea ice record, despite cloud cover and months of polar night.
很惊奇这些对于测试方法的细节，在1月份进行了超过一个18天时期，能够检查在第15页的5项研究的附录。
Those curious about detailed methodology of the test, which was conducted over an 18-day period in January, can check appendix five of the study on page 15.
可以使用tree prompts让用户能够快速地经过年和季度层，到达想要的月份。
A tree prompt can be used to allow the user to quickly navigate through the years and quarters to get to the desired month.
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