第三年第两百三十七天

[nnozomi]

成语
费尽心思 to rack one's brains, to use all the knowledge at hand
同归于尽 to die along with the enemy, mutually assured destruction
仁至义尽, great benevolence, virtue and duty
( ”pinyin” )

词汇
姑娘, girl/Miss ( ”pinyin” )

https://mandarinbean.com/new-hsk-3-word-list/

Guardian:
他费尽心思来伪装自己, he made every effort to disguise himself
最好他们两个同归于尽, ideally the two of them will do each other in
我已经等了这么久了，仁至义尽啊, I've been waiting so long already, thanks a million
姑娘，你的药单掉了, Miss, you dropped your prescription

Me:
他们费尽心思终于明白了。
这么小姑娘真的是研究生吗？