1. come into existence : 成立；

2. in existence : 存在, 现有；

1. We do not believe in the existence of ghosts.
    我们不相信真有鬼。

2. existence在线翻译

2. The explorers led a dangerous existence.
    探险家过着危险的生活。

3. The elephant is the largest land animal in existence.
    大象是现有的最大的陆上动物。

1. 存在性：因此数学家除了研究如 何解题外,还须研究某些存在性(Existence)和唯一性(Uniqueness)的问题. 对于这些问题,有时会得出否定 性的结论,例如五次或以上多项式方程是否存在一般的根式解的问题以及古希腊三大作图题(注9)等,

1. 存在;实有
    The existence of something is the fact that it is present in the world as a real thing.

    e.g. ...the existence of other galaxies...
           其他星系的存在
    e.g. The Congress of People''s Deputies in effect voted itself out of existence...
           (苏联)人民代表大会的投票在事实上终结了自身的存在。

2. （尤指逆境中的）生活，生活方式
    You can refer to someone''s way of life as an existence, especially when they live under difficult conditions.

    e.g. You may be stuck with a miserable existence for the rest of your life...
           你可能一辈子都要过着悲惨的生活。
    e.g. Their day-to-day existence was routine.
           他们的日常生活很平淡。

1. everything that exists anywhere

    e.g. they study the evolution of the universe
           the biggest tree in existence

    Synonym: universecreationworldcosmosmacrocosm

2. the state or fact of existing

    e.g. a point of view gradually coming into being
           laws in existence for centuries

    Synonym: beingbeingness