骨干 (gǔ gàn): Backbone (Noun) — Meaning & Stroke Order

He is the backbone of our class.

The mainstay of our company is actively expanding into overseas markets.

He is not a core member of the project, but his contributions are equally indispensable.

In the project, the core members are responsible for key tasks.

As the backbone of the department, she both manages the team and participates in decision-making.