2. Changing from an empty square to a short space shows that your original living space is relatively spacious, but the dormitory for military training is relatively narrow, and you will naturally feel depressed psychologically; The new classmates represent the new environment. You are dragged into the water, and he stands calmly, which shows that you are not used to the new environment and are full of vigilance, but you are also interested in the new environment, because at last, as soon as he calls you, you are no longer depressed.