“骨干”的英文怎么说？

“骨干” -Backbone

选拔和培养了一批中层骨干，完成了骨干的新老交替
Selected and has raised one batch of intermediate backbone, has completed the new replacing the old of backbone

骨干 diaphysis; backbone; the life and soul of the party;&....
欧骨干网 EPMB
校园骨干 campus backbone
髂骨干 shaft of ilium
骨干部队 skeleton army
骨干产业 backbone industry
骨干程序 framing program
骨干船员 neuleus crew; skeleton crew
骨干分子 backbone element; core member; key member
骨干链路 backbone
骨干码 skeletal code
骨干企业 1. key enterprise
骨干网 backbone network
骨干网路 backbone network
骨干小组 ginger group
骨干炎 diaphysitis
骨干枝 scaffold branch; skeleton branch

正确的答案肯定是 backbone

backbone; diaphysis

mainstay; hardcore