一是一，二是二

yīshìyī,èrshìèr
  1. lit. one is one, two is two (idiom)
  2. fig. things are (or ought to be) perfectly clear-cut
  3. unequivocal

CEDICT

Entry Composition

1 一 yī
  1. one
  2. single
  3. a (article)
  4. as soon as
  5. entire; whole; all; throughout
  6. "one" radical in Chinese characters (Kangxi radical 1)
  7. also pr. yāo for greater clarity when spelling out numbers digit by digit
=2 是 shì
  1. to be (followed by substantives only)
  2. correct; right; true
  3. (respectful acknowledgement of a command) very well
  4. (adverb for emphatic assertion)
=2 是 shì variant of 是 shì
3 一 yī
  1. one
  2. single
  3. a (article)
  4. as soon as
  5. entire; whole; all; throughout
  6. "one" radical in Chinese characters (Kangxi radical 1)
  7. also pr. yāo for greater clarity when spelling out numbers digit by digit
4 二 èr
  1. two
  2. 2
  3. (Beijing dialect) stupid
=5 是 shì
  1. to be (followed by substantives only)
  2. correct; right; true
  3. (respectful acknowledgement of a command) very well
  4. (adverb for emphatic assertion)
=5 是 shì variant of 是 shì
6 二 èr
  1. two
  2. 2
  3. (Beijing dialect) stupid

Related entries

不含糊 bùhánhu
  1. unambiguous
  2. unequivocal
  3. explicit
  4. prudent
  5. cautious
  6. not negligent
  7. unafraid
  8. unhesitating
  9. really good
  10. extraordinary