在这等一下，等我回来。

Wait a while, I'll be right back.

Source: Tatoeba

Sentence Composition

1 在 zài
  1. to exist; to be alive
  2. (of sb or sth) to be (located) at
  3. (used before a verb to indicate an action in progress)
2 这等 zhèděng
  1. (literary) this kind of; this type of
  2. this kind of; this type of
3 一下 yīxià
  1. (after a verb) a bit; a little (indicating brief duration, or softening the tone, or suggesting giving sth a try)
  2. all at once; suddenly
4 等 děng
  1. to wait for; to await
  2. by the time; when; till
  3. and so on; etc.; et al.
  4. (bound form) class; rank; grade
  5. (bound form) equal to; same as
  6. (used to end an enumeration)
  7. (literary) (plural suffix attached to a personal pronoun or noun)
5 我 wǒ
  1. I
  2. me
  3. my
=6 回来 huílai to return; to come back
=6 回来 huílái
  1. (to come or bring) back (used after a verb to indicate direction towards the speaker)
  2. back (used after a verb to indicate direction towards the speaker)
  3. to return; to come back; to be back