由于某些原因，她看起来很忧伤。

She looks blue for some reason.

Source: Tatoeba

Sentence Composition

1 由于 yóuyú
  1. due to
  2. as a result of
  3. thanks to
  4. owing to
  5. since
  6. because
2 某些 mǒuxiē some; certain (things)
3 原因 yuányīn
  1. cause
  2. origin
  3. root cause
  4. reason

classifier: 個
4 她 tā she
=5 看起来 kànqǐlai seemingly; apparently; looks as if; appears to be; gives the impression that; seems on the face of it to be
=5 看起来 kànqilai
  1. to look and perceive
  2. to seem; to look as if
6 很 hěn
  1. very; quite
  2. (also, often used before an adjective without intensifying its meaning, i.e. as a meaningless syntactic element)
7 忧伤 yōushāng
  1. distressed
  2. laden with grief