in加名词相当于副词：in silence安静地.沉默着；in caution谨慎地；in mess凌乱地；in horror恐怖地；等等

in silence例句：

She sat in silence enjoying the ebb and flow of conversation.

她默默地坐在那儿，饶有兴致地听着时高时低的谈话声。

We sat there in silence, numbed by the shock of her death.

我们默默地坐在那里发愣，因为她的死使我们感到震惊。

We all filed back to our seats in silence.

我们都默默无语，一个跟一个地回到座位上。