同学你好，该知识点来自沪江网校《2021年6月CATTI日语三级笔译【名师长期班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学好，
on top of  ... 指的是除了... 后面提到的closure和quarantine外，
come from Monday until... 从...... 开始, come有开始的意思。

on top of sth
in addition to something, especially something unpleasant
除（尤指令人不快之事）之外（还）
We missed our flight, and on top of that we had to wait seven hours for the next one.
我们没赶上飞机，而且下一班还得再等七个小时。

come
https://dictionary.cambridge.org/dictionary/english-chinese-simplified/come

Have a good day!