卢旺达的人口将增加四倍，达到4200万，这将使它的人口密度达到日本的五倍。
Rwanda's population would rise fourfold, to 42m, giving it a density five times that of Japan.
磁盘介质的存储密度，在这种密度下磁盘的信息存储量是单密度盘的四倍。
The storage density of a disk medium; storing four times the amount of information per disk as single density.
如果人体组织和电极之间的有效接触面积保持不变，那么高频电流强度扩大一倍将会使电流密度增大一倍，并产生四倍的热量。
Doubling hf-current results in a doubling of current density and a fourfold heat provided that the area of effective contact between the tissue ang the electrode remains constant.
根据全国统计局发布的数据来看，英国人口密度几乎是德国的一倍、法国的四倍。
Figures released by the Office for National Statistics show that population density in England is already almost double that of Germany and four times the figure for France.
英国人口密度大约是德国人口密度的两倍，是法国人口密度的四倍。
Crowding in England is almost double that of Germany and quadruple the population density in France.
英国人口密度大约是德国人口密度的两倍，是法国人口密度的四倍。
Crowding in England is almost double that of Germany and quadruple the population density in France.
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