質量數

atomic weight of an element / atomic mass

character / nature / quality / plain / to pawn / pledge / hostage / to question / Taiwan pr. [zhi2]

quality / (physics) mass / CL:個|个[ge4]

to measure

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

to count / to count as / to regard as / to enumerate (sb's shortcomings)

number / figure / several / CL:個|个[ge4]

frequently / repeatedly