The hard bone has dulled up the knife blade.

这硬骨头把刀刃弄钝了。

youdao

The hard bone of ink fish ( or octopus ), his air. next wherewith grind one ' s teeth.

墨斗鱼的硬骨头（或者章鱼） ，把他晾干。然后用那个磨牙。

youdao

Their skeletal structure is extremely flexible, as it is made of cartilaginous material rather than hard bone.

其骨骼构造非常柔韧，因为他们没有硬骨，只有软骨。

youdao

Then,a hard cast may be put around the area of the break to hold the bone in place while it heals.

VOA: special.2009.02.04

Biolase's Waterlase system uses a patented combination of water and lasers to precisely cut hard tissues (bone and teeth) and soft tissue (gums) with minimal damage to surrounding areas.

FORBES: Biolase Smiles Again

The patient also received lower eyelids, upper lip, skin, muscles, bone, hard palate, arteries, veins and nerves.

CNN: Face transplant patient regains self-confidence

The recent hot spell had left the course fast-running and bone-hard before the rain took the edge off for the first round.

BBC: SPORT | Golf | Last-hole eagle sees Tiger shine