骨干

gǔgàn

HSK 7

骨干 — gǔgàn

1. diaphysis (the long shaft/midsection of a long bone)

   长骨的骨干由致密骨构成，为肢体提供主要的机械支撑。 zhǎnggǔ de gǔgàn yóu zhìmì gǔ gòuchéng wèi zhītǐ tígōng zhǔyào de jīxiè zhīchēng — The diaphysis of long bones is made of compact bone and provides the main mechanical support for the limbs.

2. backbone; mainstay; key personnel or principal part of an organization or system

   技术人员是公司发展的骨干。 jìshùrényuán shì gōngsī fāzhǎn de gǔgàn — Technical staff are the backbone of the company's development.