These ponderings attempt to let themselves be appropriated by the event. (Beiträge zur Philosophie (Vom Ereignis), Martin Heidegger, 1936–38/1989)
https://en.wikipedia.org/wiki/Mereology
https://zh.wikipedia.org/zh-tw/%E5%88%86%E4%BD%93%E8%AE%BA_(%E9%80%BB%E8%BE%91%E5%AD%A6)