For decades, researchers have worried about rising mercury levels in Arctic animals, such as seals, beluga whales, and Arctic char.

几十年来，研究者们一直担心北极动物，如海豹，白鲸，汞水平，北极红点鲑等动物的含汞量增加。

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The area was rich in game such as seals, reindeer and foxes, which is reflected in other specimens encased in the permafrost that held the Saqqaq hair.

这一地区物产丰富，到处都是海豹、驯鹿、狐狸等，这也能从发现那簇头发的冻土上的其他标本反映出来。

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Harbor seals are small compared with other phocids species such as grey seals, all of which are known to fast for the entire lactation period.

与其他 phocids 物种（如灰海豹）相比，港海豹体型较小。众所周知，灰海豹在整个哺乳期都禁食。

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The disappearance of ice will not only affect wildlife in the area such as seals and penguins.

VOA: special.2009.04.22

You must have specially trained personnel such as counterterrorist SEALs to defeat a determined terrorist attack.

CENTERFORSECURITYPOLICY: LNG port security

It will be up to the military service chiefs to recommend whether women should be excluded from more demanding and deadly positions, such as Navy SEALs or the Army's Delta Force.

WSJ: Women in combat face doubts over emotions, ability

Some jobs are expected to be opened to women this year, while others - including for special forces such as the Navy Seals and the Delta Force - could take longer.

BBC: Pentagon ends ban on women in frontline combat