Antarctica is accessible by sea for a few weeks in summer and expeditions usually aimed to arrive in January or February.
在夏季的某几个星期,人们可以乘船到达南极洲,而极地考察通常在1月或2月进行。
On the morning of 28 February, we motored three hours out to sea.
2月28号上午,我们在海面上航行了三个小时。
The first map, shown below, shows the average thickness of the sea-ice in January and February this year, as the ice approached its annual maximum.
下方的第一幅地图显示了今年一、二月海冰的平均厚度,当时正值冰盖到达每年最厚的时候。
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