Summarize the natural conditions of the island and talk about the purpose of the author's description of the natural conditions of the nameless island.

Natural conditions on the island: less trees, less grass, less soil and high temperature.

The purpose of the author's description of the natural conditions of Unknown Island is to highlight the hardships of the soldiers.

Island tells what a general saw, heard and did when he inspected the troops stationed on the island under his jurisdiction. It reflects that although the soldiers on the island have a hard life, they have a childlike heart that loves the island and the motherland, showing the noble quality that the general cares about the sufferings of the soldiers and is equal to the soldiers.