随着生态系统发生变化，沙漠面积不断扩大，粮食生产日渐减少，水源枯竭，人口也不得不迁移，搬到更适宜居住的地区。
As ecosystems change and deserts expand, food production diminishes, water sources dry up and populations are pressured to move to more hospitable areas.
便宜的汽油和大量的鼓励信贷让许许多多的美国人迁移到南边的州和距离相对遥远的城市郊区（近郊繁华地区）来享受面积巨大的大房子。
Cheap petrol and ample credit encouraged millions of Americans toflock to southern states and to distant suburbs (“exurbs”) in search of bighouses with lots of land.
作为VLS I互连线的金属薄膜的截面积越来越小，其承受的功率密度急剧增加，使得电迁移成为电路的主要失效模式之一。
Consequently, the metal interconnects of VLSI have smaller sectional area and carry increasing power density, which made the electromigration become one of the main latent damage modes.
结果表明，该方法重现性好，木二糖迁移时间和峰面积的相对标准偏差分别在0.5%和2.0%以内。
The result indicated that the relative standard deviations for xylobiose's migration time and peak area were all less than 0.5%, and 2.0% respectively.
而OLP糜烂愈合延迟与患者年龄大和糜烂面积小有关，提示OLP老年患者糜烂边缘的基底细胞增殖不活跃，不能为迁移的基底细胞提供新的来源。
The fact that causes delayed healing of erosive OLP is related to elder people and smaller erosive area, suggesting that the basal cells of erosive lesion of aged patients proliferate inactively.
能量密度达到造成液态质量迁移条件的长脉冲激光，可获得较大的烧蚀率和截面积较大的通孔。
A long-pulse laser, whose energy density can cause the liquid mass transferred, can get a greater ablation ratio and a hole with larger cross section.
研究了产品外绝缘表面积污期间的憎水迁移过程，结果表明，外绝缘材质中自由状态硅氧烷分子是维持长期运行产品憎水迁移性能的唯一起作用的因素。
The result shows that the free state siloxane molecules in the external insulating material is the only contributor that supports the long term product hydrophobicity migration level.
在用海水入侵区地下水大面积灌溉冬小麦试验的同时，进行了田间小区灌溉后的土壤水盐迁移特征的研究。
The characteristics of salt and water movements were studied in Laizhou Gulf region, where seawater intrusion became a severe problem in recent years.
在用海水入侵区地下水大面积灌溉冬小麦试验的同时，进行了田间小区灌溉后的土壤水盐迁移特征的研究。
The characteristics of salt and water movements were studied in Laizhou Gulf region, where seawater intrusion became a severe problem in recent years.
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