路基边坡冲刷是指降雨形成的坡面水流破坏路基边坡坡面，并冲走坡面表层土体的现象。
Subgrade slope surface erosion is defined as a phenomenon which rain runoff destroys subgrade slope surface, and washes away soil on the surface of slope.
群租是指居住拥挤并产生较大负外部性效应的居住现象。
Renting in groups refers to the housing phenomenon of living crowded and having bigger negative externalities.
病毒的交叉感染是指两种或两种以上病毒同时感染同一计算机系统并交互作用的现象。
By cross infection of virus is meant that two or more viruses infect one computer system at the same time and interact on each other.
所谓人口老龄化是指老年人口在总人口中的比例日益增长并呈上升趋势的现象。
The so-called aging of populations is refers to the old population to grow and to assume the trend of escalation day by day in the total population proportion the phenomenon.
所谓人口老龄化是指老年人口在总人口中的比例日益增长并呈上升趋势的现象。
The so-called aging of populations is refers to the old population to grow and to assume the trend of escalation day by day in the total population proportion the phenomenon.
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