这些青年教师已经成长为学校课程改革的骨干力量。Zhèxiē qīngnián jiàoshī yǐjīng chéngzhǎng wéi xuéxiào kèchéng gǎigé de gǔgàn lìliang.These young teachers have already grown into the backbone of the school's curriculum reform.
他是我们球队的骨干,每场比赛都是主力。Tā shì wǒmen qiúduì de gǔgàn, měi chǎng bǐsài dōu shì zhǔlì.He is the backbone of our team and a starter in every game.
公司要培养一批年轻骨干,接替老员工的工作。Gōngsī yào péiyǎng yì pī niánqīng gǔgàn, jiētì lǎo yuángōng de gōngzuò.The company wants to train a group of young key staff to take over from the older employees.