The assurance of the alternative relation between things is the place where the difference between humanities and natural science exists.

对于事物之间的交互关系的把握，是人文学科与自然科学的学科分野之所在。

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In relation to HIV, alternative therapies are most commonly used in areas where it is difficult to access Western medicine.

在HIV治疗方面，替代治疗是难以获得西医治疗的地区最常使用的方法。

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Using the transfer matrix, this paper also derived the dispersion relation of the one-dimensional photonic crystal composed of alternative left-handed and right-handed materials.

利用这个转移矩阵，推导出了由左右手材料交替构成的一维光子晶体的色散关系。

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