sneak into这个短语的意思是潜入,悄悄的进入。

例句：

If I come home late. I sneak into my house so I don’t wake anyone up. 如果我回家晚了，我会静悄悄的进去，不吵醒别人。

My sister used to sneak into my bedroom at night and read my personal diary.
以前我姐姐（妹妹）经常晚上偷偷地溜进我的卧室，看我的私人日记。

We are staying in a hotel and are just propably going to sneak into another room.
我们会住在一家宾馆里的，到时候就可以溜到其他房间里去啦！