They then give rise to nerve cells, pigment-producing cells and some bones of the skull.

在此之上开始形成神经细胞，色素生成细胞和一部分头盖骨。

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Both the brain and the spinal cord are protected by bone: the brain by the bones of the skull, and the spinal cord by the set of ring-shaped bones called vertebrae that make up the spine.

脑和脊髓都受骨骼保护：脑由颅骨保护，而脊髓则由脊柱保护(一组环状的椎骨共同构成了脊柱)。

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The skull bones fuse between the ages of fifteen and twenty-five.

颅骨在15和25岁之间长合。

《柯林斯英汉双解大词典》

They raised the pirate flag -- with its picture of a skull and crossed bones.

VOA: special.2009.05.24

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Helen Michie's Whale Skull Bone, artwork in the shape of the bones of a minke whale, is planned for a site above the beach at Dunnet Bay.

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