不要再让这种事发生了！

Don't let that happen again!

Don't let that happen again.

Source: Tatoeba

Sentence Composition

1 不要 bùyào don't!; must not
2 再 zài
  1. again; once more; re-
  2. further; beyond this point of time
  3. (before an adjective) more
  4. then (after sth, and not until then)
  5. no matter how ... (followed by an adjective or verb, and then (usually) 也 yě or 都 dōu for emphasis)
  6. (used to introduce additional information, as in 再則 zàizé, 再就是 zàijiùshì etc)
  7. (literary) to reappear; to reoccur
3 让 ràng
  1. to yield
  2. to permit
  3. to let sb do sth
  4. to have sb do sth
  5. to make sb (feel sad etc)
  6. by (indicates the agent in a passive clause, like 被 bèi)
4 这种 zhèzhǒng this kind of
5 事发 shìfā
  1. (impersonal) a (bad) incident occurs
  2. a (bad) incident occurs
6 生 shēng
  1. to be born
  2. to give birth
  3. life
  4. to grow
  5. raw
  6. uncooked
  7. student
=7 了 le
  1. (completed action marker)
  2. (modal particle indicating change of state, situation now)
  3. (modal particle intensifying preceding clause)
=7 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 無 wú or 不 bù) completely (not); entirely (not); (not) in the least
  4. to understand clearly (variant of 瞭 liǎo)
=7 了 liǎo
  1. (of eyes) bright
  2. clear-sighted
  3. to understand clearly
=7 了 liào unofficial variant of 瞭 liào