名詞 look out:

1. a person employed to watch for something to happen
   同義詞：lookout, lookout man, sentinel, sentry, watch, spotter, scout, picket
2. an elevated post affording a wide view
   同義詞：lookout, observation post
3. a structure commanding a wide view of its surroundings
   同義詞：lookout, observation tower, lookout station, observatory
4. the act of looking out
   同義詞：lookout, outlook

動詞 look out:

1. be vigilant, be on the lookout, be on one's guard, be careful
   同義詞：watch, watch out
2. to protect someone's interests

1. Look out!
   小心！
2. FBI is on the look out for the agent these days.
   這些天聯(lián)邦調查局正在注意那個特工。
3. Police will be looking out for trouble-makers at today's match.
   今天的比賽有警察防備著搗亂分子。