| white rat |
The Brown Rat or Norway Rat (Rattus norvegicus) is one of the most well-known and common rats, and also one of the largest. Thought to have originated in northern China, this rodent has now spread to all continents and is the dominant rat in Europe and much of North America. It is a common pest wherever humans live, particularly in urban areas and degraded environments. It is also an important model organism in biological research, as well as a common pet. ...
출처: en.wikipedia.org/wiki/White_rat
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