heavy fog

基本解释

The highway to Nanjing is/was/has been closed due to the heavy fog.
因为大雾，通往南京的高速公路关闭了。
With a smile, Kongming answered, “From my view, Cao Cao will not take the risk—coming forth in this heavy fog.
孔明笑曰："吾料曹操于重雾中必不敢出。
The plane crashed short of the runway in heavy fog after controllers told the pilot to divert to Moscow or Minsk, Russian officials said.
俄罗斯官员说，这架飞机在浓雾中未能降落在跑道上，随即失事，此前塔台控制人员曾告诉飞行员，要他转往莫斯科或明斯克的机场降落。

The color also is easier to see in the heavy fog that often covers the area.
And for all Thursday's celebrations - big and small the skies in Beijing were clear and blue, a striking departure from the heavy fog of a day earlier.
The plane crashed as it tried to land amid heavy fog, killing all onboard - President Lech Kaczynski, his wife Maria and a delegation that included Poland's top military leaders as well as many political and cultural figures.

We landed in Frankfurt in heavy fog and gathered in the terminal for the first time as a full group.
NEWYORKER: The Grand Tour