他们认为,去反驳一个不认识的人有些不礼貌。

They consider it impolite to disagree with someone they don't know very well.

Source: Tatoeba

Sentence Composition

1 他们 men they; them
2 认为 rènwéi to believe; to think; to consider; to feel
3
  1. to go
  2. to go to (a place)
  3. (of a time etc) last
  4. just passed
  5. to send
  6. to remove
  7. to get rid of
  8. to reduce
  9. to be apart from in space or time
  10. to die (euphemism)
  11. to play (a part)
  12. (when used either before or after a verb) to go in order to do sth
  13. (after a verb of motion indicates movement away from the speaker)
  14. (used after certain verbs to indicate detachment or separation)
4 反驳 fǎn
  1. to retort
  2. to refute
=5 一个 ge
  1. a; an; one
  2. the whole (afternoon, summer vacation etc)
=5 一个
  1. Combination of the numeral (“one”) and the generic classifier : a; an; one
  2. same
6
  1. no; not so
  2. (bound form) not; un-
7 认识 rènshi
  1. to know
  2. to recognize
  3. to be familiar with
  4. to get acquainted with sb
  5. knowledge
  6. understanding
  7. awareness
  8. cognition
=8 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 de "one made of leather" or 跑堂兒的 pǎotángrde "a waiter (literally, one who runs back and forth in a restaurant)" or 新的 xīnde "new one")
  5. also pr. or di in poetry and songs
=8 a taxi; a cab (abbr. for 的士 shì)
=8 really and truly
=8 (bound form) bull's-eye; target
9 rén person; people

classifiers: ,

10 有些 yǒuxiē
  1. some
  2. somewhat
11
  1. no; not so
  2. (bound form) not; un-
12 礼貌 mào
  1. courtesy; politeness; manners
  2. courteous; polite