唯二

wéièr
(slang) (adjective) (of one thing) one of the only two; (of two things) the only two

CEDICT

slang

Entry Composition

1 唯 wéi
  1. only
  2. alone
  3. -ism (in Chinese, a prefix, often combined with a suffix such as 主義 zhǔyì or 論 lùn, e.g. 唯理論 wéilǐlùn, rationalism)
2 二 èr
  1. two
  2. 2
  3. (Beijing dialect) stupid