| 释义 |
altostratus
UK [ˌæl.təʊ'strɑ:.təs] US [-toʊ'streɪ.tˌəs] US [-'strɑ:-] noun uncountable specialized
■a type of stratus (= flat grey cloud) formed in thin layers and found at medium height, above the level of stratus 高层云（灰白成层的云，见于中等高度，在层云之上） Compare cirrostratus ; nimbostratus |