The meaning (context) of drifting, drifting and disappearing in the sixth grade lesson 17 of Jiangsu Education Press can be understood without pretending.

Wandering: refers to a person's career and life are not fixed, running around. The article refers to the elk running around in China, with uncertain residence.

Wandering from place to place: living a hard life and wandering around. The article mentioned that the elk were slaughtered, and their life was very hard.

Disappear; Describe hiding or not showing up in public. It is rare to see elk slaughtered in large numbers.