Our noses are capable of 7 human smells even when these are 8 to far below one part in one million.
我们鼻子能够（7）察觉到细微的人体气味，即使这种气味（8）微弱到总量的百万分之一。
Adopted in 1991, it stands for a multiplying factor of one part in a million billion billion (one septillion) parts, which is often written as 1024.
它在1991年被采用，代表“一千的八次方分之一”的系数，通常写作1024。
Adopted in 1991, it stands for a multiplying factor of one part in a million billion billion (one septillion) parts, which is often written as 1024.
它在1991年被采用，代表“一千的八次方分之一”的系数，通常写作1024。
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