The study of techniques for deciphering cryptographic writings or systems.
研究译解密码书写或密码系统技巧的学科。
Modern techniques for the study and manipulation of gene expression provide us with the tools to study the molecular pathology of the embryo.
同时，用于研究和操控基因表达的现代生物学技术为我们提供了从分子水平研究胚胎病理学的工具。
Therefore, it is quite indispensable for us to study the techniques of composition writing.
因此，对写作教学方法的研究是十分必要的。
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