Question

有些年纪大的人看不惯这种不男不女的打扮。 CCP 20

Accepted Answer

Some old people can't stand such a sexless style of dress.

不~不~ used with two monosyllabic adjectives or location words with opposite meanings to indicate something is "just right," or sometimes used to indicate a dissatisfying intermediate state. It is also used with antonymic monosyllabic verbs or morphemes to indicate "if not... will not...," or used with two monosyllabic synonyms as an emphatic form of "not."

Front	有些年纪大的人看不惯这种不男不女的打扮。
Back	Some old people can't stand such a sexless style of dress. 不~不~ used with two monosyllabic adjectives or location words with opposite meanings to indicate something is "just right," or sometimes used to indicate a dissatisfying intermediate state. It is also used with antonymic monosyllabic verbs or morphemes to indicate "if not... will not...," or used with two monosyllabic synonyms as an emphatic form of "not."
Page	CCP 20

Monosyllabic 有些年纪大的人看不惯这种不男不女的打扮 People Stand Sexless Style Dress 不~不~