不好意思，現在線路繁忙。

Sorry, the line is busy now.

Source: Tatoeba

Sentence Composition

1 不好意思 bùhǎoyìsi
  1. to feel embarrassed
  2. to find it embarrassing
  3. to be sorry (for inconveniencing sb)
2 現在 xiànzài now; at present; currently
3 線路 xiànlù
  1. (electricity) line; circuit; wire
  2. (traffic) road; track; route
4 繁忙 fánmáng
  1. busy
  2. bustling