阴天多云

overcast day───[气象]阴日；阴天

overcast seam───阴缝

overcast seams───阴缝

overcautious───adj.过分谨慎的

overcautiously───谨慎地

overcloud───v.损坏，（使）变阴；（使）布满云层

overclouds───v.损坏，（使）变阴；（使）布满云层

overfastidious───过火的

overhastily───检修

's been overcast (cloudy) for a month.───一个月以来，天一直是阴沉沉的。

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

The scientists tested this material in a variety of conditions and found it could be rapidly and repeatedly charged even if the day was cloudy, overcast or rainy.───科学家在不同的条件下对这种材料进行了测试，发现即使是在阴天、多云天气或是雨天，它也能够迅速、重复地补充能量。

SKY SCATTERED OVERCAST CLOUDY OVERCAST RAIN SHOWERS TO WITH SNOW SNOW───零星阵雨阴转多云阴有雨