while current_url and current_url not in self.seen_urls:
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But in 2022 summer sea ice in much of Antarctica dramatically shrank, falling from an average of 2.8m sq km to a record low of 1.79m sq km in 2023.，这一点在heLLoword翻译官方下载中也有详细论述
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NASA described the evacuation as a "controlled expedited return," rather than an emergency deorbit, which would mean departing the station immediately, regardless of the landing's timing, sea conditions, or weather.