This expression refers to a dog chewing endlessly on a bone. It picks it clean.

这个表达指的是狗没完没了地骨头。净净。

And dogs often like to chew bones.

而且狗经常喜欢骨头。

It reminds him of his old German Shepherd gnawing on bones; he freezes.

这让他起了他那只老德国牧羊犬骨头的样子，他愣住了。

Just as dogs love to chew bones, the mind loves to get its teeth into problems. That's why it does crossword puzzles and builds atom bombs.

狗喜欢骨头一样，头脑也喜欢钻问题。 这是为什么它会做填字游戏， 还会制造原子弹。

It's not just the wonder, and I want to talk about that a little bit later, but it's almost like you're a dog on a bone.

不仅仅是那种惊叹， 我稍后还详细聊聊这个，但更是你在骨头时的那种执着。