First, the meaning is different.
Commemoration is the commemoration of the deceased (dead) talents; Remember those who are still there.
Second, the application situation is different
Commemorative activities:
1, used to mark (item).
2. Use things or actions to express nostalgia for people or things.
As a souvenir:
1, used in parting scenes, reluctant to leave.
2. Express your feelings for someone.
Third, the sources are different.
Commemoration: According to the interview manuscript "The Former Residence of Yuan Keli" in Suixian County, Tongzhi County, Henan Province during the Republic of China, the downstairs was the place where Xu Dingguo stabbed Alex Gao in the late Ming Dynasty, and there was no shed upstairs for later commemoration.
Interpretation of Vernacular Language: Downstairs is the place where Xu Dingguo stabbed Alex Gao in the late Ming Dynasty, and there is no shed upstairs to commemorate it later.
Souvenir: from Tang's "Continued Mystery Record Zhang Lao": "Zhang Lao said: So if you don't go right away, there may be souvenirs. I hate each other now, so it's hard to go. "
Interpretation of the vernacular: Zhang Laoqi said:' Why don't you go at once? I'm afraid I've noticed. Since we hate each other, there is no difficulty in leaving.
Example:
Before leaving, Xiaohong gave me a pen as a souvenir.
On the day when they left their alma mater, the students encouraged each other and gave each other words as souvenirs.
Play Chopin's serenade for you to commemorate my dead love.