半夜磨牙
乌云密布(The sky) clouded over.； Black clouds gather overhead.； Dark clouds were gathering in the sky.； The clouds gathered black. cloud ；双语例句1.The sky was dark and threatening. 天空乌云密布，阴沉沉的。2.The sky blackened and soon it began to rain. 天空乌云密布,很快便下起雨来.3.Bob always enjoys sailing, even though the weather is cloudy. 鲍勃总是很喜欢航行, 即使空中乌云密布.
吃出新味来
overcast 是正统的美语说法.1. The overcast sky suggests rain.2. I like overcast days better than sunny days.
