独一无二

unique and unmatched (idiom); unrivalled / nothing compares with it

alone / independent / single / sole / only

only / unique

one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit

not to have / no / none / not / to lack / un- / -less

two / 2 / (Beijing dialect) stupid