That being said, it does book provides a practical, easy to understand, step by step guide to magical protection that can be put into use really by anyone with a desire to try.
也就是说，它是书提供了一个实际的，很容易理解，一步一步向导魔法保护用的是非常可以放进他想试一试。
A previous method has been successfully extended to be a more practical guide in calculating and predicting dielectric constants of materials.
作者将前人推导出来的理论推广到计算和预测材料的介电常数上面来，提出了一个很实用的指导性方法。
Vision is needed in order to inspire effort, but it has to be a vision that is firmly grounded in reality, so as to guide the practical work that is needed in order to fulfil ambitions.
我们需要理想来激励我们奋发向上。 不过，我们的理想必须切合现实，才能引领我们为宏图而付出踏实的努力。
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