But the lowest summer ice cap on record put sea ice far north of the outer continental shelf , the shallow , life-rich shelf of ocean bottom in the Bering and Chukchi seas.

 
  • 但夏季冰冒的最低纪录是在远方北边的外围大陆棚还有海冰存在。大陆棚是在白令海峡和处克其海峡,又浅又充满生物的海底。
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