BBC听力 | 冰雪世界 19
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After several days at sea
在海上浮游几天之后，
the male bear finally makes landfall
公北极熊终于登岸了
drawn by pungent smells emanating from the island.
它是被岛上强烈的气味吸引来的
By the end of summer the bear has lost half his weight.
夏天结束时这只北极熊的体重已经减少了一半
With the ice long gone
冰层融化之后
he is forced onto land in search of food.
它不得不在陆地上寻找食物
There will be no easy meals on this island.
这个岛上的食物并不容易获得
Walruses are the largest seals in the world.
海象是世界上最大的海豹（？）
Their weight over a tonne
海象的体重可以超过一吨
and are armed with tusks a metre long.
而且有长达一米的尖利牙齿
Exhausted from his swim
北极熊经过长时间的游泳已经筋疲力尽了
the bear must regain his strength.
它必须要恢复捕食的力量
The next day a sea fog shrouds the island.
第二天，雾给小岛披上了一层轻纱
The walruses sense that they're in danger.
海象感觉到一种莫名的危险正在迫近
Using the fog as cover the bear approaches the herd.
熊在雾的掩护下向海象群靠近
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