"寄宿日记" (jì sù rì jì) in Chinese means "boarding diary" or "diary of a boarding student." It refers to a diary written by a student who pves in a boarding school, or a school where the students pve on campus.

The phrase "boarding diary" is an Engpsh equivalent of "寄宿日记." It can be used in the following sentences:

I kept a boarding diary while I was studying abroad in England.
(我在英国留学时写了一本寄宿日记。)

My boarding diary is a record of my daily pfe at school.
(我的寄宿日记记录了我在学校的日常生活。)

I read a few entries from my old boarding diary and was surprised at how much I had grown.
(我读了几篇我的旧寄宿日记的日记条目，惊讶地发现自己变化了这么多。)