这硬骨头把刀刃弄钝了。

The hard bone has dulled up the knife blade.

但嵌入式计算是一块难啃的硬骨头。

But embedded computing is a tough nut to crack.

墨斗鱼的硬骨头（或者章鱼） ，把他晾干。然后用那个磨牙。

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

可是你还是赌气要和我分手，你知道吗，我的心在那一刻就像蛀牙啃到硬骨头一样阵阵剧痛！

But you still want a fit of anger and broke up with me, you know, my heart at that moment is like tooth decay, bite into hard bone, like bursts of pain!

第一个胜利最明显，是地缘上的胜利，中国避开了雄心壮志的希拉里，她可是个经验老道的硬骨头，在打击敌人方面可谓战功赫赫。

The first victory is the obvious one, the geopolitical victory; China no longer faces the prospect of Hillary Clinton, a tough, experienced opponent with a record of standing up to bullies.