"When I was young, my finger fell off and I suddenly looked back at my youth." What does this passage mean?

The meaning is as follows:

The past time, whether wonderful or dull, has passed in a hurry, and when I look back, I find that my most beautiful time has passed away like smoke.

From:

Who is going to Suzhou today? ?

A pillow of autumn frost and a bronze mirror are cold, and two lines of tears are warm. ?

Pick the yarn in the east corner, Sang Yu has no brocade handkerchief. ?

Nagato doesn't hide the Golden Temple, and Shushan has a sense of being a sword fairy. ?

Before the dust flies, blame the dragon. ?

There are clouds and grievances on it, and there are shadows of towers falling down. ?

At the end of the year, the silk and bamboo withered and the string broke. ?

Moss slightly masks the copper hairpin and gently inserts the purple jade by hand. ?

The hidden box of fish intestines is not light, and the magic flower is finally lost. ?

Who planted the evening fragrance Yongyangfang, who hid the silver needle world of mortals. ?

Blowing flowers and unforgettable purple clothes, how do young people know that they are crazy? ?

The dental plate sings low eyebrows, and Lampard remembers the old makeup. ?

The shadow of sinking sand weaves wind and rain, and the lost water inherits the rivers and lakes. ?

Who will forget the tall buildings first? Unexpectedly, Beimang came late. ?

Looking at the mountains and rivers in the southeast and protecting the city in the northwest. ?

I was lonely for three thousand years in my last life, and I don't know if I will be together for a short time in this life.