candidate key短语⁶⁸⁵⁹² 基本例句 候补键,候选键 Cryptography can do nothing in resolving above problems, but digital watermarking which is one of the research focus in the academic world presents a candidate key to those questions. 密码技术在解决这些问题就无能为力了，而目前国内外正研究的数字水印技术是解决这一问题的良好途径。 cnki