principal mark meaning in English

曲线控制点

A tall tree was thus the principal mark
大树是最重要的标记。
With the rapid development of the internet technology , html has not met the wider application of the web because of its inherent deficiency . xml as the subset of sgml is specially designed for the web application , and would become the principal marked - up language , because it not only overcome the shortcoming of html , but also eliminate the needless function of sgml to the web user at present
随着互联网技术的飞速发展， html语言本身所具有的弱点，使得其已不能满足web越来越广泛的应用， xml可扩展标记语言是专门为web应用设计的一个简单的sgml的子集，既克服了html的不足，又去除了sgml中那些对于当前web用户来说不必要的特性，必将成为web应用的主流标记语言。