Cast iron manhole cover anti impact resistance, easy rupture.
铸铁检查井盖不耐冲击,易破裂。
Out of nearly 50,000 votes cast, one in five people named it for having made the greatest impact on the past, present and future.
在近五万名公众参与的投票中,五分之一的人认为X光机对人类的过去、现在以及将来,都具有巨大而深远的影响。
Out of nearly 50, 000 votes cast, one in five people named it for having made the greatest impact on the past, present and future.
在近五万名公众参与的投票中,五分之一的人认为X光机对人类的过去、现在以及将来,都具有巨大而深远的影响。
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