长见识

to gain knowledge and experience

length / long / forever / always / constantly

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

to see / to meet / to appear (to be sth) / to interview / opinion / view

to appear / also written 現|现[xian4]

to gain first-hand knowledge of sth / to experience for oneself / knowledge / experience / insight

to know / knowledge / Taiwan pr. [shi4]

to record / to write a footnote