It is said that the Inuit have many words for snow, but when it comes to the Northwest Passage only one type of frozen water matters: multiyear ice.

• 相传因纽特人有许多描述雪的词，但在西北航道上只有一种冻结的水是值得注意的：多年冰，它可以像刀切黄油一样划开船身。