exist
单词辨析：
除了用作连系动词外，还可表示某物存在或某事发生，常用于正式文体。
to be or not to be
生存还是毁灭
The great empire has ceased to be.
那个伟大的帝国已不复存在了。
Where is the wedding to be?
婚礼在何处举行？
指真实地发生或存在，也可指在困境中生活，不用进行时。
I believe that God exists.
我相信上帝存在。
Salt exists in many things.
许多东西中都含有盐分。
Fish cannot exist without water.
没有水，鱼就不能生存。
He exists on porridge.
他靠稀粥度日。
指生存、存活，或者强调以某种方式过活，可用进行时。
His grandmother lived until she was 105.
他的祖母活到105岁。
Since their marriage, the young couple has been living happily.
结婚之后，这对年轻的夫妻过着幸福的生活。
The local people there have lived through two world wars.
那里的当地居民经历过两次世界大战。
相关例句：
Does life exist on Mars?
火星上有生命吗？
Problems also exist in agriculture.
农业也存在着一些问题。
Many theories on punishment exist, all of which are variations on a theme.
关于惩罚的理论有很多，虽形式略有不同，但其主旨都是一样的。
Given the sheer number of stars that exist it's a mathematical certainty that there is life on other planets.
考虑到现有星球数量，从数学的角度来说，其他行星上面肯定存在生命。
Polyester silk dealer and polyester manufacturer in the market prices hang upside down, spinning factory sales inventory pressures, pressures exist side by side.
涤丝市场上经销商与涤丝厂家价格倒挂，纺丝厂家库存压力、销售压力并存。
The addict often reads disapproval into people's reactions to him even where it does not exist
这个瘾君子经常把别人对他的反应当作反感他的意思，即使别人并没有那个意思。