The sky is cloudy, and looks like rain.
天空阴沉沉的，像是要下雨。
The room became cloudy with a blue haze of smoke.
蓝幽幽的烟使房间雾气腾腾。
This is a cup of cloudy water.
这是一杯混浊的水。
The weather is now clear, now cloudy.
天气一会儿晴一会儿阴。
The lime water has turned cloudy, therefore carbon dioxide has been produced during the experiment.
石灰水变得混浊了，可见在实验中有二氧化碳生成了。
The day was dull, with a cloudy sky.
天气阴暗多云。
We observed that it had turned cloudy.
我们注意到天已经变阴了。