exist

动词 exist:

1. have an existence, be extant
   同义词：be
2. support oneself
   同义词：survive, live, subsist

1. That department has ceased to exist.
   那部门已不复存在。
2. I can hardly exist on the wage I'm getting; there is no money for luxuries.
   我靠我挣的工资简直难以　口，根本无钱享受。
3. Man cannot exist without air.
   没有空气人就不能生存。
4. The Roman Empire existed for several centuries.
   罗马帝国存在了几百年。

ex.ist

v.intr.（不及物动词）
ex.ist.ed,ex.ist.ing,ex.ists
To have actual being; be real.
实际存在；真实
To have life; live.See Synonyms at be
有生命；生存参见 be
To live at a minimal level; subsist:
维生： 生活在极低的水平；维持生活：
例句：
barely enough income on which to exist.
仅够糊口的收入

To continue to be; persist:
继续存在；保持存在：
例句：
old customs that still exist in rural areas.
在农村地区旧的风俗依然存在

To be present under certain circumstances or in a specified place; occur:
存在：在一定情状或一定地点存在；存在：
例句：
.Wealth and poverty exist in every demographic category.(Thomas G. Exter)
.富裕和贫穷存在于所有人口统计分类中.(托马斯G.埃克斯特)

来源：
Latin existere, exsistere [to come forth, be manifest]
拉丁语 existere, exsistere [显出，明显]
ex- [ex-]
ex- [前缀，表.出自….]
sistere [to stand] * see st3-
sistere [位于] *参见 st3-