backbone

Human is a group of animals that have skulls and backbones.

人类是有头骨和脊椎的动物。

Agriculture forms the backbone of the rural economy.

农业是农村经济的支柱。

Primary care should be the backbone of any health care system.

基础医疗应该是任何医疗保健系统的支柱。

There is a conventional story line in the newsroom culture that provides a backbone and a ready-made narrative structure for otherwise confusing news.

在新闻编辑室文化中有一条传统的故事主线，它能为那些其他情况下混乱的新闻提供一个主干和现成的叙事结构。

He doesn't have the backbone to face the truth.

他没有面对现实的勇气。

You can find the blue backbone of the book easily.

你可以很容易地看到这本书的蓝色书脊。