都是在……的入口处的意思,但to 指的是进入,of 是指...的入口
例句：
The enemy mined at the entrance to the village.
敌人在村口布了地雷.
They put the food at the entrance to the cave.
他们把食物放在洞的入口处.
Here was the entrance of the gallery.
这里是画廊的入口处.
The visitors lined up at the entrance of the exhibition.
参观的人在展览会入口处排队.