Dust Travel is a scientific sketch written by Comrade Gao Shiqi. The reason why this text is lively and interesting is mainly the use of metaphor, which is very vivid. The first sign of being alive is the change of metaphor. In the space on the earth, dust drifts with the air and is everywhere, so the article compares it to a "never-tired traveler".

Dust is a traveler. It is very small. It drifts with the turbulence of the air and travels around the world with the wind. The air around us is almost everywhere, from indoors to outdoors, from cities to villages, from plains to mountains, from deserts to oceans. A truly dust-free space can only be created in the laboratory. Dust is the destroyer of breathing, which can block the nostrils, inflame the trachea, injure the lungs, and cause infectious diseases such as colds, influenza and pneumonia. If the dust is mixed with tuberculosis, it is even more dangerous. Therefore, spitting must be prohibited. In addition, metal dust, especially lead, can poison people; Lime and cement dust can damage our lungs and corrode our skin; Pollen can cause asthma. In this case, in order to resist the invasion of dust, we must wear masks or masks. Finally, dust will not cause explosion, which is a serious accident and must be prevented. Therefore, we should pay more attention to washing hands and bathing frequently, and pay attention to environmental hygiene and personal hygiene. Let's have a better body.