观察组滤器的平均寿命短于对照组（P<0.05）。
The mean life of filter in observation group was shorter than that in control group(P<0.05).
争论的另一部分是所有观察到的侏儒平均寿命都短。
The other part of the argument is that all observed pygmy populations have a short life expectancy.
争论的另一部分是所有观察到的侏儒平均寿命都短。
The other part of the argument is that all observed pygmy populations have a short life expectancy.
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