能量守恒

conservation of energy (physics)

surname Neng

can / to be able to / might possibly / ability / (physics) energy

energy / capabilities

to measure

capacity / quantity / amount / to estimate / abbr. for 量詞|量词[liang4 ci2], classifier (in Chinese grammar) / measure word

to guard / to defend / to keep watch / to abide by the law / to observe (rules or ritual) / nearby / adjoining

conservation (e.g. of energy, momentum or heat in physics) / to remain constant (of a number)

surname Heng

permanent / constant / fixed / usual / ordinary / rule (old) / one of the 64 hexagrams of the Book of Changes (䷟)

variant of 恆|恒[heng2]