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According to the Encyclopedia, the electron fluxes in the lower Van Allen Belt have changed markedly since the 1962 high- altitude nuclear explosions by the US and USSR, never returning to their former state.

根据《大百科全书》，自从1962年美国和苏联进行的高纬度核爆炸之后，汇合于低层范爱伦带的电子显著地改变了，再也没有回复它们原来的状态。

Between August and September 1958, the US Navy exploded three fission type nuclear bombs 480 km above the South Atlantic Ocean, in the part of the lower Van Allen Belt closest to the earth's surface.

1958年8、9月间，美国海军在距离地球表面最近的低层范爱伦带的一部分南大西洋上空480公里处爆炸了3枚裂变式原子弹。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。