偷偷插入

例句：

1. 1. They sneaked into the room without anyone noticing.
   他们悄悄地溜进了房间，没有人注意到。
2. 2. She sneaked out of the house before dawn.
   她在黎明前悄悄溜出了家门。
3. 3. The thief sneaked into the safe to steal the money.
   小偷悄悄地进入保险箱偷钱。