pillar

1. N-COUNT A pillar is a tall solid structure that is usually used to support part of a building. 柱子

...the pillars supporting the roof. …支撑屋顶的柱子。

2. N-COUNT If something is the pillar of a system or agreement, it is the most important part of it or what makes it strong and successful. (系统、协议的) 核心

The pillar of her economic policy was keeping tight control over money supply. 她的经济政策的核心就是严格控制货币供应。

3. N-COUNT If you describe someone as a pillar of society or as a pillar of the community, you approve of them because they play an important and active part in society or in the community. 栋梁[表赞许]

My father is a pillar of the community. 我父亲是社区的顶梁柱。