文献中括号里的emphasis in the original怎么翻译比较好

文献中括号里的emphasis in the original怎么翻译比较好
He describes the presence in the system of the actually occurring expressions (the instances),and the rules that validate their use as follows (emphasis in theoriginal)：
其中括号里的emphasis in theoriginal怎么翻译比较好
急 在线等