骨干 gǔgàn diaphysis (long segment of a bone)
diaphysis (long segment of a bone); figuratively backbone
How to remember 骨干: 骨 bone + 干 do = diaphysis (long segment of a bone).
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How it is used
- The backbone / core members of a group - 技术骨干 (jìshù gǔgàn) key technical staff, 骨干力量 (gǔgàn lìliàng) the mainstay.
- Figuratively the pillar people who carry an organization; from 'the shaft of a bone'.
- Register: organizational; common in HR/work contexts.