tusk

A huge tusk decorated the wall of his study..他书房的墙上装饰着一支巨大的象牙。

First find the key to the museum, then get the mammoth tusk from the natural history wing..首先找到进入博物馆的门，然后从自然历史展区拿到猛犸象牙。

That hole is now being filled - thanks to narwhals, medium-size whales, endemic to the Arctic, known as unicorns of the seas because of the single, spiralling tusk found in males..这个洞现在正在被填补起来--这归功于角鲸，一种中等大小的，北极特有的鲸，因为雄鲸长着一个螺旋纹的长牙而被称为海中的独角兽。