n. millionth
abbr. ppm
misc. one in a million
·2,447,543篇论文数据，部分数据来源于NoteExpress
那不是它的百万分之一！
虽然大多数致病突变在人类中发现的概率为千分之一到百万分之一，但基础突变发生的几率可能高得多。
While most disease-causing mutated are found in humans at a rate of one in a few thousand to one in a few million people, founder mutation can occur at much higher rates.
我相信那是百万分之一的机率。
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