準確是什麼時候？

When exactly?

Source: Tatoeba

Sentence Composition

1 準確 zhǔnquè accurate; exact; precise
=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 什麼時候 shénmeshíhou when?; at what time?