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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Grin tire bottom, bottom white glaze, ring foot round, causing fetal bone Caine fine white bottom book "Great Qing Qianlong year, " the sixth Hang Kaishu paragraph two.

底露白胎，底施白釉，圈足圆润，胎骨坚致细白，底书“大清乾隆年制”六字二行楷书款。

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Complicated pelvic fracture including sacrum bone fracture mostly displays pelvic posterior ring injuries.

复杂的骨盆骨折多数存在骨盆后环损伤，包括骶骨骨折。

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While his young, strident opponents flung themselves forward with bone-crunching crudeness, he collected their callowness calmly, and guided it out of the ring.

BBC: The life of a sumo wrestler

And when these Americans come home at night, bone-tired, and turn on the news, all they see is the same partisan three-ring circus here in Washington.

WHITEHOUSE: President Obama Addresses the Nation on Dangers of Default