碧空、昙天、阴天中，可见光与近红外通道的反射率，均是以阴天为最大；

Among clear air, cloudy sky and overcast sky, the maximum of reflective ratio within visible and near infrared tunnels appears in overcast sky.

反射率小，晴天平均为0.040.05，阴天为0.060.08；

The reflective radiation and the albedo are smaller, the albedo is 0.04 0.05 in the clear sky, and 0.6 0.8 in the overcast sky;

那一日阴天下雨沉闷无聊。

It was a wet and gloomy day.

连续3天都是阴天。

For three days it was overcast

明天是阴天。

Tomorrow will be overcast.

昨天是阴天。

It was cloudy yesterday.

“我们看得到蓝色的天空，但谷底却比天色暗得多——就像是阴天一样。”

"We see the sky is blue, but down in the valley it's darker — it's like on a cloudy day ．"

在阴天或晚上,用太阳钟或日晷是无法分辨时间的。

On cloudy days or at night it was impossible to tell the time with a sun clock or a sundial.

自动，日光，阴天，白炽灯，荧光灯，荧光灯H，用户自定义。

Auto, Daylight, Cloudy, Tungsten, Fluorescent, Fluorescent H, or Custom White Balance.

晴天的Pn明显高于阴天。

The Pn in the sunny day was markedly higher than that of in the cloudy day.

晴天日和阴天日PAR的变化有明显的区别；

There are distinctly differences between the PAR ′ s variations on the clear and cloudy days.

阴天天气条件下，4个柑橘品种的Pn日变化规律模式均为单峰曲线，最大值出现在上午11∶00。

In overcast day, all citrus presented one peak curve in diurnal variation of Pn and the maximum value occurred at 11: 00.