第二年第一百四十七天

[nnozomi]

语法
究竟 in questions: another intensifier (top of page)
https://resources.allsetlearning.com/chinese/grammar/Expressing_%22in_the_end%22_with_%22jiujing%22

词汇
件, piece/counter word; 条件, condition 件 jiàn, piece/counter word; 条件 tiáojiàn, condition
https://mandarinbean.com/new-hsk-2-word-list/

Guardian:
究竟对你什么好处, what on earth good does it do you?
那天晚上究竟发生了什么, just what happened that night?
有一件事情我一直没想明白, there's one thing I've never wanted to understand

Me:
你们明天究竟来不来？
今天这么热，只要穿一件衬衫。