A study suggests that the Arctic "may be essentially ice-free during summer within 15 years."
一項研究顯示，北極"在15年內可能會在夏季基本無冰"。
The study used statistical models to predict the future amount of Arctic ice, which suggested that the Arctic could be ice-free in the summer during the decade of the 2030s – most likely in the year 2034.
該研究利用統計模型預測了北極冰層的未來數量，表明在21世紀30年代的十年裡，極有可能是在2034年，北極可能會在夏季無冰。
Sea ice is frozen ocean water that melts each summer, then refreezes each winter.
海冰是凍結的海水，每年夏季融化，然後每年冬季重新凍結。
The amount of summer sea ice in the Arctic has been steadily shrinking over the past few decades because of global warming.
由於全球變暖，過去幾十年來，北極夏季海冰的數量一直在穩步減少。
It reached its second-smallest level on record in 2019, the National Oceanic and Atmospheric Administration said.
美國國家海洋和大氣管理局說，2019年北極夏季海冰水平僅次於歷史最低記錄。
What scientists refer to as the first "ice-free" Arctic summer year will occur when the Arctic has less than 1 million square kilometers of sea ice.
科學家所說的首個“無冰”北極夏季的年份將出現在北極海冰不足100萬平方公里的時候。
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