誰能翻譯下骨幹的英文？

elite精英,骨幹.最常用的詞 There are many elites in the company. backbone骨幹 assest財富,意譯為"骨幹" 1. 他是隊 的骨幹. He's an enormous asset to the team. pillar支柱,意譯為"骨幹" He is the pillar of the company. 骨幹(醫學方面) 1. diaphysis 2. backbone