因为肿瘤是不同的基因变异细胞组成的混合物，每一个细胞会产生不同的混乱变异。
That's because a tumor is made up of a hodgepodge of cells containing different genetic mutations, each of which allows it to wreak a different brand of havoc.
人类的大多数变异基因都是中性的，这意味着变异之所以被激发不是出于自然选择，而是由于产生了良性变异或染色体在复制时候发生了混乱。
Most variation in the human genome is neutral, meaning that it arose not by natural selection but by processes like harmless mutations and the random shuffling of the genome between generations.
市场中往往有着大量的不确定性因素，这些因素共同激发了不小的变化，产生不断加剧风险和混乱的市场环境，导致消费需求的变异。
There are often a large number indefinite factor that stimulate some variation in market, lead to market environment that aggravate risk and disorder, result in the change on consumption demand.
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