行李先存在这里，回头再来取。

Let's check our luggage here and come back for it later.

《新英汉大辞典》

他们发生是因为有事先存在的原因。

They happen because of pre-existing causes.

youdao

要关联的工作项不需要预先存在。

The work item to associate does not need to exist before this point.

youdao

To sort of give you a quick taste, if after my death I won't exist, how could anything be bad for me?

让你们先来体会一下，如果在我死后，我不存在了，对我来说怎么会有坏事情？

耶鲁公开课 - 死亡课程节选

Now, we're not thinking about total antibody concentration because you already have a lot of antibodies circulating within your blood and in your fluids.

现在,我们先不考虑抗体总浓度,因为你的体内已存在许多抗体,在血液以及体液中循环

耶鲁公开课 - 生物医学工程探索课程节选

Now the natural alternative is to say, the key to being the same person is not the sameness of the soul, whether or not it exists, ! but rather having the very same--body!

现在还有一个理论认为，成为同一个人的关键,不在于是否有同样的灵魂，先不管灵魂是否存在，而是拥有同样的--肉体！

耶鲁公开课 - 死亡课程节选