第二年第二百三十九天

[nnozomi]

语法
topic + 由 + S + V "it's X person who is doing Y"
https://resources.allsetlearning.com/chinese/grammar/Emphasizing_the_doer_of_an_action_with_%22you%22

词汇
碰, touch/meet; 碰到，碰见, meet/run into ( pinyin )

https://mandarinbean.com/new-hsk-2-word-list/

Guardian:
老黄住院了就由我来代谢, as Lao Huang is in the hospital it's I who has come to say thank you
这个决定就由沈教授来做吧, as for this decision, it's up to you, Professor Shen
我不许你碰他, you may not lay a finger on him

Me:
每天的洗盘子由我必须得处理。
我购物之间碰见了他。