对于那个,我不确信。

I am not certain about that.

Source: Tatoeba

Sentence Composition

1 对于 duìyú regarding; as far as (sth) is concerned; with regard to
2 那个 nàge
  1. that one
  2. that thing
  3. that (as opposed to this)
  4. (used before a verb or adjective for emphasis)
  5. (used to humorously or indirectly refer to sth embarrassing, funny etc, or when one can't think of the right word)
  6. (used in speech as a filler, similar to "umm", "you know" etc)
  7. (euph.) menstruation
  8. sex
  9. also pr. nèige
3 我 wǒ
  1. I
  2. me
  3. my
4 不 bù
  1. no; not so
  2. (bound form) not; un-
5 确信 quèxìn
  1. to be convinced
  2. to be sure
  3. to firmly believe
  4. to be positive that
  5. definite news