This method utilized the protected layer of hydrofluoric acid and magnesium fluoride, with fewer technics, less time, more simple operation, easier controlling, less material, lower cost and higher performance products.
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Controlling viewing is easier to do during the preschool years than during the school years, so you should initiate a pattern of restricted television watching now.
在学前控制孩子们看电视比在上学之后要容易一些。因此，你现在就应该着手制定一个限制看电视的模式。
Slowly, he discovered that controlling anger was easier than hammering, and the number of nails hammered started going down.
渐渐地他发现控制怒火要比往墙上钉钉子容易多了，于是每天往墙上钉的数量少了。
The method is clear in physical concept, and it is unnecessary to construct special controlling functions, hence the method makes the grid generation easier and also reduces some empirical influences.
结果表明：该法以求解拉普拉斯方程组为基础，物理概念明确，且无需构造“合并”或“聚集”控制函数，使得方程离散简单，经验性因素降低；
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