existence的動詞為exist
例句
1、
The existence of God is beyond human understanding.
上帝的存在與否是超出人類所能理解的。
2、
She conjectured the existence of a completely new species.
她推測有一個全新物種存在。
3、
We led a poor but happy enough existence as children.
我們兒時的生活雖然貧窮卻過得很愉快。