我們可以回顧過去，但不能改變過去；我們可以改變未來，但不能預知未來。

The past can only be known, not changed. The future can only be changed, not known.

Source: Tatoeba

Sentence Composition

1 我們 wǒmen we; us; ourselves; our
2 可以 kěyǐ
  1. can
  2. may
  3. possible
  4. able to
  5. not bad
  6. pretty good
3 回顧 huígù
  1. to look back
  2. to review
=4 過去 guòqù
  1. (in the) past; former; previous
  2. to go over; to pass by
=4 過去 guòqu (verb suffix)
5 但 dàn
  1. but; yet; however; still
  2. merely; only; just
6 不能 bùnéng
  1. cannot
  2. must not
  3. should not
7 改變 gǎibiàn
  1. to change
  2. to alter
  3. to transform
=8 過去 guòqù
  1. (in the) past; former; previous
  2. to go over; to pass by
=8 過去 guòqu (verb suffix)
9 我們 wǒmen we; us; ourselves; our
10 可以 kěyǐ
  1. can
  2. may
  3. possible
  4. able to
  5. not bad
  6. pretty good
11 改變 gǎibiàn
  1. to change
  2. to alter
  3. to transform
12 未來 wèilái
  1. future
  2. tomorrow
  3. approaching
  4. coming
  5. pending

classifier: 個
13 但 dàn
  1. but; yet; however; still
  2. merely; only; just
14 不能 bùnéng
  1. cannot
  2. must not
  3. should not
15 預知 yùzhī
  1. to anticipate
  2. to foresee
16 未來 wèilái
  1. future
  2. tomorrow
  3. approaching
  4. coming
  5. pending

classifier: 個