pack ice

音标发音

Polar bears living in a large southern edge of the Arctic pack ice zone.
北极熊生活在有大片浮冰的北极南部边缘地带。
When the Belgica became stuck in pack ice, her crew achieved the unintended distinction of being the first humans to overwinter in the Antarctic.
贝尔基卡号被困于浮冰之时，他的船员们意想不到的成为第一批在南极过冬的人。
The Yamal is one of Russia's biggest, most powerful icebreakers, and one of the few ships in the world capable of cutting through the thick Arctic pack ice.
Yamal是俄罗斯大型，动力最强的破冰船之一，是有能力破开北极厚厚的冰层通行的少数船只之一。

Polar pack ice, ice that builds up over many years, has not been seen for eight years.
NPR: Climate Changes Lives of Whalers in Alaska
One afternoon last winter, two ships lined up side by side in a field of pack ice at the mouth of the Ross Sea, off the coast of Antarctica.
NEWYORKER: Neptune’s Navy
The pack ice became all but impenetrable.
ECONOMIST: Antarctic exploration

a large mass of ice floating in the sea that has been formed by smaller pieces of ice being forced together

Pack ice is an area of ice that is floating on the sea. It is made up of pieces of ice that have been pushed together.