地球科学
cs 卷层云
Cirrostratus is a "very subtle" cloud that can be nothing more than a milky whitening of the sky.
BBC: Weather talk: Is there a way to make it interesting?
英汉双解词典包含3185865条英汉词条,基本涵盖了全部常用单词的翻译及用法,是英语学习的有利工具。