About graduation:

There is a difference between "boundary" and "level".

First of all, in terms of usage, "conversation" is more widely used than "level". Graduates say "grade" instead of "grade", while students use "grade", such as grade 20 19 and grade 2020, which are commonly used in schools, especially colleges and universities.

Secondly, there are also differences in algorithms. "Session" is calculated according to the graduation year; "grades" are calculated according to the year of admission. For example, he entered the university in 20 17 and graduated in 202 1 year, that is, 2 1 graduates and 17 students. "Grade" is generally used after graduation, while "grade" is used before graduation.

In addition, there are differences in daily use. Generally speaking, which level is called during school and which session is called after graduation. The original meaning of the word "duration" is "arrival" and "arrival time", such as "at that time". When this original meaning was extended, the word "session" became a quantifier representing the whole process, such as "the first Olympic Games" and "the Third Plenary Session of the Eleventh Central Committee".

To sum up, it is:

Level refers to the year of admission, for example, admission in 2020 is 2020;

Session refers to the graduation year, for example, graduation in 2020 is the 2020 session.

Graduation copy:

1. Graduation is the story of millions of summers, millions of people, millions of different summers, and the same thing is just to say goodbye. -Li Zelin runs like a dog.

Don't be sad because of parting. Goodbye is the only way to see you again. Whether it's temporary or long-lost friends. Richard? Vacation cabin

What bothers me recently is that a little parting always makes people feel lonely, so I intend to accumulate those short-lived encounters and parting fragments bit by bit and cherish them. -Yuki Midorikawa's "Natsume Friends Account"

You always say that graduation is far away, and then you go your separate ways. -"You at the same table"