2 Sentences With "grave affair"

How to use grave affair in a sentence? Find typical usage patterns (collocations)/phrases/context for "grave affair" and check conjugation/comparative form for "grave affair". Mastering all the usages of "grave affair" from sentence examples published by news publications.

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Elon Musk's surprise SXSW talk this morning was a heavy and grave affair, full of discussion around all the ways humanity may be doomed in the future: from carbon in the atmosphere, World War III, and above all, runaway artificial intelligence. from The Verge
Sun Deng's "death" and reappearance is typical for Daoist shijie 尸解 "release from corpse" fake burial, the lowest level of xian "transcendence". This "grave affair" refers to Ji Kang getting involved in Cao Wei court politics, and sentenced to death by regent Sima Zhao for testifying to help a friend.