相思病

lovesickness

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)

to yearn / to pine

to think / to consider

illness / CL:場|场[chang2] / disease / to fall ill / defect

sick with love