What's the difference between cloudy and cloudy days?

Cloudy and cloudy days are distinguished by the amount of clouds in the sky and the intensity of sunlight:

1, cloudy means that there are many clouds in the sky and there is not enough sunshine, but you can still see sunny days through the cracks in the clouds. A weather phenomenon with low cloud cover of 4/ 10-7/ 10 or high cloud cover of 6/ 10- 10.

2. Cloudy days refer to the condition that the total amount of low clouds in the sky is 8/ 10 or above, the sun rarely or cannot penetrate through the clouds, and the sky is dark. Clouds are usually gray or black and thicker than normal. ?

Extended data:

The satellite cloud image of China Central Meteorological Observatory was taken from Fengyun-1 and other meteorological satellites.

Using satellite cloud images for analysis can improve the accuracy of weather forecast. Weather forecast is usually divided into three types: short-term weather forecast (2 ~ 3 days), medium-term weather forecast (4 ~ 9 days) and long-term weather forecast (10 ~ 15 days or more). CCTV mainly broadcasts short-term weather forecast every day.