横向比较各个物种发现，体型较大的动物通常寿命更长：比如说人比老鼠寿命长。
Across different species, bigger animals tend to live longer: Compare men with mice.
比较了它们的平均寿命和寿命方差。
The average lifetime and lifetime variance of these systems are compared.
比较了不同初始裂纹尺寸对疲劳寿命的影响。
Effect of different initial crack sizes on fatigue life was compared.
不同的是该材料的疲劳寿命曲线的应力范围比较窄。
But the stress changing range in fatigue life curve is narrow.
不同的是该材料的疲劳寿命曲线的应力范围比较窄。
But the stress changing range in fatigue life curve is narrow.
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