我們突然聽見外面傳來了一下槍聲。

All at once we heard a shot outside.

Source: Tatoeba

Sentence Composition

1 我們 wǒmen we; us; ourselves; our
2 突然 tūrán sudden; abrupt; unexpected
3 聽見 tīngjiàn to hear
4 外面 wàimiàn
  1. outside (also pr. wàimian for this sense)
  2. surface
  3. exterior
  4. external appearance
5 傳來 chuánlái
  1. (of a sound) to come through
  2. to be heard
  3. (of news) to arrive
=6 了 le
  1. (completed action marker)
  2. (modal particle indicating change of state, situation now)
  3. (modal particle intensifying preceding clause)
=6 了 liǎo
  1. to finish
  2. (used with 得 dé or 不 bù after a verb to express (im)possibility, as in 忘不了 wàngbuliǎo "cannot forget")
  3. (literary) (usually followed by a negative such as 无 wú or 不 bù) completely (not); entirely (not); (not) in the least
  4. to understand clearly (variant of 了 liǎo)
=6 了 liǎo
  1. (of eyes) bright
  2. clear-sighted
  3. to understand clearly
=6 了 liào unofficial variant of 瞭 liào
7 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
8 槍聲 qiāngshēng
  1. crack
  2. shooting sound
  3. gunshot