当且仅当 dāng qiě jǐn dāng

DEFINITIONS

  1. if and only if

CHARACTERS

当 dāng
HSK 3
bear, accept, undertake; just
且 qiě
HSK 3
moreover, also (post-subject); about to, will soon (pre-verb)
仅 jǐn
HSK 4
only, merely, solely, just
当 dāng
HSK 3
bear, accept, undertake; just