替补

替补	tì bǔ	to replace (a damaged component with a new one, an injured player with a substitute player, full-time workers with casual workers etc) / a substitute / a replacement
替	tì	to substitute for / to take the place of / to replace / for / on behalf of / to stand in for
补	bǔ	to repair / to patch / to mend / to make up for / to fill (a vacancy) / to supplement