Her career is the be-all and end-all of her existence.

她的事业是她生活中一切的一切。

《牛津词典》

See this person for the miracle that she is, and be grateful for her existence.

而去觉察他身上的奇迹，并感恩他在你生命中的存在。

youdao

She could have been anyone. I knew of her existence but by then it was too late.

她本来可以是任何人，我知道她的存在，但现在来说，太迟了。

youdao

She had died so many years before him that local tradition noted very little of her existence.

VOA: special.2009.10.31

It is often considered that her existence was so dull as to defy narration.

ECONOMIST: Literary lives

And my attempts to prove her existence were in vain.

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Sounes felt that the fact that friends and family knew all about Desiree-Gabrielle and that he "thanks" his daughter on an album sleeve were "clues" to her existence at any rate.

BBC: Dylan's secret marriage uncovered