低谷有雾的英文表达是 "fog in the valley".
这个表达来源于描述山谷地区特有的气象现象。在山谷地区，空气湿度较高，当早晨气温低于地面温度时，水汽就会凝结成细小的水滴，形成雾气。这种现象常常发生在山谷地区，因此得名为 "fog in the valley".
下面是一些例句：
The valley was shrouded in fog, making it hard to see the road ahead. (山谷里笼罩着雾气，很难看到前方的路。)
The fog in the valley was so thick that we couldn't see more than a few feet in front of us. (山谷里的雾气很浓，我们看不到前方几英尺外的东西。)
As the sun rose, the fog in the valley started to pft and the landscape became visible again. (太阳升起时，山谷里的雾气开始消散，风景再次可见。)