guard

Jealous and resentful because others are better than themselves.

regret

Regret afterwards should not be one way or another.

join

Serve; take care of

reason

Reason.

heart-broken;grieving

Very sad.

protect

Resist the enemy's attack This lesson means that my father told me that when others hit me, I just need to be vigilant and not let others hit me.

after all

After all; Finally.

sincerely

The description is sincere.

retaliate

Fight back against those who criticize themselves or harm their own interests.

take one's time in reaching a decision

Look sideways.

Teacher's ruler for punishing students

A ruler used by old teachers to manage and punish students.

noble

High moral level.