只知其一，不知其二

to know the first, but not know the second (idiom); only partial information

only / merely / just / but

variant of 只[zhi3]

grain that has begun to ripen

variant of 只[zhi3]

classifier for birds and certain animals, one of a pair, some utensils, vessels etc

to know / to be aware

his / her / its / their / that / such / it (refers to sth preceding it)

one of the given (options etc) / the first / firstly

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

no; not so / (bound form) not; un-

not to know / unaware / unknowingly / fig. not to admit (defeat, hardships, tiredness etc)

secondly / the other (usu. of two) / the second

two / 2 / (Beijing dialect) stupid