"多云"的英语是 "partly cloudy".
来源：此词来自气象学语言。
英文例句及其中文翻译：
The weather forecast says it's going to be partly cloudy tomorrow.
天气预报说明明天将是多云的。
It's a partly cloudy day, but the sun is still shining.
今天是多云的天气，但太阳仍在照耀。
The sky was partly cloudy with patches of blue.
天空多云，有一片片的蓝色。