我们给孩子房间装了小夜灯，这样他晚上醒来时不会害怕。

We put ___night-lights in our child's room so he won't be scared when waking up at night.

我们在楼梯上安装了夜灯，防止在黑暗中绊倒。

We installed ___night-lights on the stairs to prevent tripping in the dark.