本文在对喷雾降尘机理深入分析的基础上，指出了常规喷雾降尘系统的主要弊端。
Based on deep analysis of spray dust-settling mechanism, the paper has put forward main malpractices of conventional dust control methods.
迷航问题是超文本信息模型中的主要弊端，解决该问题需要使用超文本数据信息的导航方法。
The disorientation problem is a main disadvantage in hypertext information model. For solving the problem, we require to use the navigational method in hypertext data.
当前我国企业所得税比例税率形式的主要弊端是税收收入的弹性小，差别比例税率有失公平。
The main disadvantages of China's existing proportional rate of tax are low flexibility and unfairness of tax revenue.
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