significant character meaning in English

有效字符
有义字符

This is a significant character . all the application based on network must be running on the all internet system
这是一个重要的特征，因为基于网络的应用程序应该能运行在所有internet平台之上。
If a path contains no significant characters it is invalid unless it contains one or more " . " characters followed by any number of spaces , then it will be parsed as either " . " or " . "
如果路径没有包含有效字符，则该路径无效，除非它包含后跟任意数目空格的一个或多个“ . ”字符，然后将它作为“ . ”或“ . . ”进行分析。
After the cold war , with the alteration of the international framework , development of world economics and the demand of the international security , the phenomenon of international interference has rapidly increased , and become one significant character of international relationship
冷战结束以来，伴随着国际局势的变动、世界经济的发展及国际安全的需要，国际社会中干预的现象迅速增多，并进而成为国际关系的一个重要特征。