This marks precisely—to within a few thousand years—the point of mass extinction on the land.
这明确标志着正是在这几千年中，发生了陆地上的大规模灭绝。
This observation is a useful starting point for any discussion of extinction as it highlights the role of luck and chance in the extinction process.
对一些灭绝的讨论像它在灭绝过程中突出了运气和机会的角色，这个观察是一个很有用的出发点。
Many reefs have been fished to a point of extinction.
很多礁石已被过度捕捞面临消失的绝境。
The reduction of the residual current of the ground-fault point is beneficial to the extinction of the grounding arc and to the reduction of the intermittent arc grounding over voltage.
减小接地故障点的残流有利于接地电弧的瞬间熄灭及降低间歇性电弧接地过电压。
The reduction of the residual current of the ground-fault point is beneficial to the extinction of the grounding arc and to the reduction of the intermittent arc grounding over voltage.
减小接地故障点的残流有利于接地电弧的瞬间熄灭及降低间歇性电弧接地过电压。
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