較差

range (the difference between the lowest and highest values)

mediocre / rather poor / not specially good

to compare / to dispute / compared to / (before adj.) relatively / comparatively / rather / also pr. [jiao3]

difference; discrepancy / (math.) difference (amount remaining after a subtraction) / (literary) a little; somewhat; slightly

different / wrong; mistaken / to fall short; to lack / not up to standard; inferior / Taiwan pr. [cha1]

to send (on an errand) / (archaic) person sent on such an errand / job; official post

used in 參差|参差[cen1 ci1]

diurnal range (temperature, humidity etc)

annual range (temperature, humidity etc)