周围全是陌生人，这让汤姆感到很不自在。

Tom is ill at ease among strangers.

Source: Tatoeba

Sentence Composition

1 周围 zhōuwéi environs; surroundings; periphery
2 全是 quánshì to be full of; all; without exception
3 陌生人 mòshēngrén stranger
=4 这 zhè
  1. (pronoun) this; these
  2. (bound form) this; the (followed by a noun)
  3. (bound form) this; these (followed by a classifier) (in this sense, commonly pr. zhèi, esp. in Beijing)
=4 这 zhèi (coll.) this
5 让 ràng
  1. to yield
  2. to permit
  3. to let sb do sth
  4. to have sb do sth
  5. to make sb (feel sad etc)
  6. by (indicates the agent in a passive clause, like 被 bèi)
6 汤姆 Tāngmǔ Tom (name)
7 感到 gǎndào to feel; to sense; to perceive
8 很 hěn
  1. very; quite
  2. (also, often used before an adjective without intensifying its meaning, i.e. as a meaningless syntactic element)
9 不自在 bùzìzai
  1. uneasy
  2. ill at ease