Bad strata are often encountered in the process of drifting in mines,if improperly treated,they will lead to serious deformation of drift,even collapse,so as to increase the amount of repair work.This paper took level 1280 strike drift of Dragon Head Mine as example to make an approach to the construction technology for drifting in bad strata.
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"In the absence of this species, ecosystems stop working well and may even collapse," Di Martino says.
“如果没有这一物种,生态系统就无法正常运转,甚至可能崩溃。”迪·马蒂诺说。
If the space structure suffers the blast load, it will be seriously damaged and even collapse.
空间结构若遭受爆炸荷载作用,会产生严重破坏,甚至发生整体倒塌。
University of Minnesota study recently published in the journal Nature found that a significant share of the world's crop-growing regions are seeing growth stagnate, slow or even collapse.
明尼苏达州一所大学最近在《自然》杂志上公布的研讨发现,世界大部分粮食减产地区都将迎来无增长,缓慢增长,甚至是减产。
After receiving more than $180 billion in emergency federal assistance to stave off collapse, AIG recently gave top employees bonuses totaling $165 million - even as the company reported the biggest quarterly loss in U.S.corporate history.
VOA: standard.2009.03.24
Second, even if it didn't collapse, they said you've got a radiation problem.
第二点,即使不坍塌,他们说会存在辐射问题。
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