being          
noun [ C or U ] uk/ˈbiː.ɪŋ/ us/ˈbiː.ɪŋ/
C2 生命,生物
a person or thing that exists
  A nuclear war would kill millions of living beings. 一场核战争会夺去数百万人的生命。 
 Strange beings from outer space are still a popular subject for sci-fi movies. 外星人仍是许多科幻电影流行的主题。 
  存在;生存
the state of existing
  We do not know exactly how life first came into being (= began to exist.) 我们不知道生命最初究竟是如何诞生的。 
 - More examples
 - Some fans seem to regard footballers as divine beings.
 - The United States is in the van of the quest to establish contact with beings from the beyond.
 - There was a man on the news last night who reckons we've been visited by beings from other worlds.
 - All living creatures are thought to descend from an organism that came into being three billion years ago.
 - Dinosaurs pre-existed human beings by many millions of years.