(1) "Flowers smell like people", that is, the molecules with the fragrance of flowers keep moving irregularly and diffuse into the air, indicating that the molecules keep moving irregularly. The higher the temperature, the more intense the molecular movement and the faster the diffusion. Therefore, we can know from the fragrance of flowers that the surrounding temperature suddenly rises.
(2) There is an interactive attraction and repulsion between molecules, so it is not easy to pull the rope hard because of the attraction between molecules.
So the answer is: diffusion; Molecules never stop moving randomly; Intensified molecular movement; cite