长于

to be adept in / to excel at

length / long / forever / always / constantly

chief / head / elder / to grow / to develop / to increase / to enhance

to go / to take / sentence-final interrogative particle / variant of 於|于[yu2]

(of time or place) in; at; on / (indicating any indirect relation) to; toward; vis-à-vis; with regard to; for / (indicating a source) from; out of / (used in comparison) than / (used in the passive voice) by