教学相长

when you teach someone, both teacher and student will benefit

surname Jiao

to teach

religion / teaching / to make / to cause / to tell

to teach (as a professor)

teaching / instruction / CL:門|门[men2],個|个[ge4]

to learn / to study / to imitate / science / -ology

each other / one another / mutually / fret on the neck of a pipa 琵琶[pi2 pa5] (a fret on the soundboard is called a 品[pin3])

appearance / portrait / picture / government minister / (physics) phase / (literary) to appraise (esp. by scrutinizing physical features) / to read sb's fortune (by physiognomy, palmistry etc)

length / long / forever / always / constantly

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