我们必须调查医生的失踪案。

We have to look into the disappearance of the doctor.

Source: Tatoeba

Sentence Composition

1 我们 wǒmen we; us; ourselves; our
2 必须 bìxū
  1. to have to
  2. must
  3. compulsory
  4. necessarily
3 调查 diàochá
  1. investigation
  2. inquiry
  3. to investigate
  4. to survey
  5. survey
  6. (opinion) poll

classifiers: 項, 個
4 医生 yīshēng doctor

classifiers: 個, 位, 名
=5 的 de
  1. of; ~'s (possessive particle)
  2. (used after an attribute when it modifies a noun)
  3. (used at the end of a declarative sentence for emphasis)
  4. (used after a noun, verb or adjective to form a nominal expression, as in 皮革的 pígéde "one made of leather" or 跑堂儿的 pǎotángrde "a waiter (literally, one who runs back and forth in a restaurant)" or 新的 xīnde "new one")
  5. also pr. dì or di in poetry and songs
=5 的 dī a taxi; a cab (abbr. for 的士 dīshì)
=5 的 dí really and truly
=5 的 dì (bound form) bull's-eye; target
6 失踪 shīzōng
  1. to be missing
  2. to disappear
  3. unaccounted for
7 案 àn
  1. (legal) case
  2. incident
  3. record
  4. file
  5. table