• hankou


The path can be regarded as a kind of research method for tracing scientific outcomes. We can review the path to know what happened in our examinations. During the coronavirus outbreak, medical professionals also try to figure out the spreading path from the patients to those places they visited. Because the virus is invisible by human eyes without a microscope, people cannot really tell where the virus is in our environment. To prevent from getting infected, being careful has been the most important part in our life.

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