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与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
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To view the counts based on habitat and colour, assign your data to a data frame and pass those columns to table().

table(df$habitat, df$colour)

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
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