请问（1.sub.1)是什么意思？

请问专利要求里（1.sub.1)是什么意思？one humid hydrolysis (2.sub.1) 又是什么意思？谢谢！

由于1.sub.1不是常用的词语，您还是把整个一句话贴上来吧。
有时候，.sub.会代表下标。您可以判断一下。

3. The process according to claim 2, wherein the hydrolysis step (1) comprises:
(1.sub.1) at least one hydrolysis of organohalosilanes (I) to obtain a crude hydrolysate having at least three phases comprising: a gas phase comprising hydrogen halide gas under pressure, a siloxane fluid F.sub.1 comprising .alpha.,.omega.-dihalogenated linear oligomers and optionally, to a lesser extent, of cyclic oligomers, and an aqueous phase containing the hydrogen halide saturated solution S.sub.1 ;
(1.sub.2)......
7. The process according to claim 6, wherein the duration of the humid hydrolysis reaction (2.sub.1) ranges between 4 and 20 min.
全文就是这样的，感觉像是项目符号，但不知道怎么翻译才好，7.humid hydrolysis reaction 是湿法分解反应吗？好像没听说过，希望前辈能给指点一下，谢谢了。

那应该就是1.1的意思，表示“1”的下一层划分。

下标不正常显示的时候就会变成\".sub.\"，这在化合物申请的国际公布文本中有时会出现。