你也可以向字典、百科全书或者任何书面文献寻求信息。
You can also consult a dictionary, an encyclopedia, or any other written reference.
书面描述应当包括参考文献，也可包括合适的图表。
The written description should include references and may involve diagrams if applicable.
书面描述应当包括参考文献，也可包括合适的图表。
The written description should include references and may involve diagrams if applicable.
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