In brain-cancer research, for example, while the numbers for average survival time haven't changed much, there's an increasingly long tail on the curve, indicating a few patients are living for years.
2
是数字9，因为9没有尾巴就成了零，同样，孔雀没有尾巴也一无是处。
The number is 9, because it's 0 without its tail and likewise, a peacock is nothing without its tail.
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