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- These clouds are ominous. 这些云是不祥的预兆。
- These clouds are ominous. They portend a severe storm. 这些云是不祥的预兆, 预示着一场大风暴即将来临。
- Sometimes these clouds are so extensive that they are virtually indistinguishable from one another, forming a sheet of cirrus called cirrostratus. 卷云是高云的一种，是对流层中最高的云，平均高度超过6000公尺。
- These clouds are small and white, and usually line themselves up in groups in a regular pattern. They resemble the small ripples created by a gentle breeze on water surface. 这种云块看起来很小,呈白色,通常成行成群,排列整,像微风吹过水面泛起的小波纹。
- It is not known exactly how molecular clouds like Barnard 68 form, but it is known that these clouds are themselves likely places for new stars to form. 我们现在还不是很清楚像巴纳德68这种分子云是如何形成的，但我们知道它们很可能是新恒星将形成的地方。
- These clouds were seen to persist for as long as Voyager's cameras could resolve them.North of these, a bright cloud band similar to the south polar streak may be seen. 海王星上的黑点，我们称为大暗斑，是一个巨型的风暴，在海王星的表面也可以清楚地看到云带。
- Rain clouds are banking up. Hope they'll blow over. 雨云正在聚积起来。希望它们会散去。
- Dark clouds are a sign of rain or snow. 乌云是雨或雪将至的预兆。
- There were ominous dark clouds gathering overhead. 不祥的阴霾在头顶上汇聚。
- Black clouds are an unmistakable sign of coming rain. 乌云是下雨的明显前兆。
- There are ominous signs of a downturn in Britain, too. 在英国，房价也出现了反转的征兆。
- In the evening the rosy clouds were gorgeous. 傍晚的云霞绚丽多彩。
- The clouds are fleeting before wind. 云在风前飞驰而过。
- The clouds are gathering,it will probably rain. 乌云在集结，天可能要下雨。
- He had a fall, which was ominous of his downfall. 他曾跌倒，这是他垮台的征兆。
- War clouds are gathering in the Middle East. 中东战云密布。
- But there were ominous signs as well. 这里也有不详的预兆。
- Clouds are banking up along the horizon . 云在地平线上集结成堆。
- Clouds are banking up along the horizon. 云在地平线上集结成堆。
- Heavy clouds are the forerunners of a storm. 阴云密布是暴风雨的前兆。
