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| 1. | into these areas during the warm summer months and retreated to lower latitudes ahead of the cold and long |
| 也可能是它们每年在温暖的时期迁徙到这些地区，而又赶在极区寒冷的长夜到来之前离去。 |
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| 2. | This paper introduces the method for cutting of net size and shape for long latitude edge of polar side |
| 介绍了混合式球罐极带边板长纬向边的净料切割方法，切割轨道半径的计算，切割轨道的结构特点，放样点的分布。 |
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