The mirror on the wall is very old.

墙上的镜子非常旧。

The mirror on the wall is very large.

墙上的镜子很大。

There is mirror on the wall.

墙上有面镜子。

I fixed the mirror on the wall.

我把镜子安装在墙上。

Mirror, mirror on the wall, who is the fairest of them all? In this case, you'll act as the mirror.

镜子镜子，谁是世界上最美的人？这种情况下，你就把自己当做一面镜子。

And as I pan my camera to the right, I noticed there was a mirror on the wall and I saw they were actually reflecting in it.

当我将镜头移至场景右侧时，我发现墙上有面镜子，而他们的身影恰好被反射在镜中。