当且仅当冰淇淋是香草口味，小王会吃这个冰淇淋。

If and only if the ice-cream is vanilla flavour will Xiao Wang eat it.

Source: Tatoeba

Sentence Composition

1 当且仅当 dāngqiějǐndāng if and only if
2 冰淇淋 bīngqílín ice cream
=3 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)
=3 是 shì variant of 是 shì
4 香草 xiāngcǎo
  1. aromatic herb
  2. vanilla
  3. alternative name for Eupatorium fortunei
  4. (fig.) loyal and dependable person (old)
5 口味 kǒuwèi
  1. a person's preferences
  2. tastes (in food)
  3. flavor
6 小王 xiǎowáng
  1. (Mainland China, Internet slang) Wang Hongwen
  2. (Taiwan, neologism, colloquial) other man; male lover; someone romantically involved with a person already in a committed relationship
  3. (card games) the black joker, one of the two jokers that has a darker or monochrome appearance
  4. Wang Hongwen
  5. a surname
  6. other man; male lover; someone romantically involved with a person already in a committed relationship
  7. the black joker, one of the two jokers that has a darker or monochrome appearance
  8. young king
=7 会 huì
  1. can; to have the skill; to know how to
  2. to be likely to; to be sure to
  3. to meet; to get together
  4. meeting; gathering
  5. (suffix) union; group; association
  6. (bound form) a moment (Taiwan pr. huǐ)
=7 会 kuài (bound form) to reckon accounts
=8 吃 chī
  1. to eat; to consume
  2. to eat at (a cafeteria etc)
  3. to eradicate; to destroy
  4. to absorb
  5. to suffer (shock, injury, defeat etc)
=8 吃 chī variant of 吃 chī
9 这个 zhège
  1. (pronoun) this
  2. (adjective) this
10 冰淇淋 bīngqílín ice cream