The enlarging or reconstruction requirement of existing tunnel, which can be divided into increases based on traffic flow, new ventilation or escape space, old tunnel reinforcement and so on.
既有隧道的扩挖或改建需求,大致可分为基于交通量增加、新增通风或逃生空间、老旧隧道维修补强等。
Neutrinos can thus escape from regions of space where light and other kinds of electromagnetic radiation are blocked by matter.
因此,中微子可以从光和其他电磁辐射被物质阻挡的空间区域中逃逸出来。
Carbon dioxide and methane in the atmosphere block the escape of heat into space.
大气中的二氧化碳和甲烷阻止热量向太空散发。
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