实验中的变异也可以分为系统变异(systematic variation)和非系统变异(unsystematic variation)。前者导致数据在一个方向上的变化大于在另一个方向上的变化,即导致一个定向的变 化。
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土壤特性的空间变异性是土壤重要的属性之一,其变异来源包括系统变异和随机变异两种。
Soil characteristics spatial variability is one of the important attributes of soil, and its sources of variation includes random variation and system variation.
我们不但能够理解现有的系统,同时也表明变异能够修补进化过程缺失的环节。
Not only do we have system we can understand here, but it shows us how evolution could have tinkered with variation.
随着年龄的增长,久而久之,变异的数量逐渐超出了系统修复能力,线粒体开始出现故障进而停止运作。
Over time, as we age,the number of mutations begins to outstrip the system’s ability to makerepairs, and mitochondria start malfunctioning and dying.
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