黄昏时分，天色渐暗，我们打开了车灯。

The ___dimness of the evening made us turn on the car lights.

我对那件事的记忆模糊不清，很多细节都想不起来了。

The ___dimness of my memory about that event makes it hard to recall the details.

房间里的昏暗光线增加了他视力的模糊感。

The poor lighting in the room increased the ___dimness of his vision.