因为人类是一种群居动物，所以友情是生活里面一个必要的方面。

As human beings are social animals, friendship is an essential part of life.

Source: Tatoeba

Sentence Composition

1 因为 yīnwèi
  1. because
  2. owing to
  3. on account of
2 人类 rénlèi
  1. humanity
  2. human race
  3. mankind
=3 是 shì
  1. to be (followed by substantives only)
  2. correct; right; true
  3. (respectful acknowledgement of a command) very well
  4. (adverb for emphatic assertion)
=3 是 shì variant of 是 shì
4 一种 yīzhǒng one kind of; one type of
5 群居 qúnjū to live together (in a large group or flock)
6 动物 dòngwù animal

classifiers: 隻, 群, 個
7 所以 suǒyǐ
  1. therefore
  2. as a result
  3. so
  4. the reason why
8 友情 yǒuqíng
  1. friendly feelings
  2. friendship
=9 是 shì
  1. to be (followed by substantives only)
  2. correct; right; true
  3. (respectful acknowledgement of a command) very well
  4. (adverb for emphatic assertion)
=9 是 shì variant of 是 shì
10 生活 shēnghuó
  1. to live
  2. life
  3. livelihood
=11 里面 lǐmiàn variant of 里面 lǐmiàn
=11 里面 lǐmiàn
  1. inside
  2. interior
  3. also pr. lǐmian
=12 一个 yīge
  1. a; an; one
  2. the whole (afternoon, summer vacation etc)
=12 一个 yīgè
  1. Combination of the numeral 一 (“one”) and the generic classifier 個／个: a; an; one
  2. same
13 必要 bìyào
  1. necessary
  2. essential
  3. indispensable
  4. required
=14 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
=14 的 dī a taxi; a cab (abbr. for 的士 dīshì)
=14 的 dí really and truly
=14 的 dì (bound form) bull's-eye; target
15 方面 fāngmiàn
  1. respect
  2. aspect
  3. field
  4. side

classifier: 個