拾遗补缺

to remedy omissions and correct errors (idiom)

to ascend in light steps

to pick up / to collate or arrange / ten (banker's anti-fraud numeral)

to pocket a lost article / (fig.) to correct others' errors / to remedy omissions (in a text etc)

to lose / to leave behind / to omit / to bequeath / sth lost / involuntary discharge (of urine etc)

(bound form) to leave behind

to repair / to patch / to mend / to make up for / to fill (a vacancy) / to supplement

to fill a vacancy / to make up for a shortage / to supply a deficiency

deficiency / lack / scarce / vacant post / to run short of