a thin uniform layer of hazy cloud at high altitude
双语例句
1. The first clouds are thin, wispy cirrus, followed by sheets of cirrus and cirrostratus and altostratus.
最开始的云石薄而缥缈的卷云，紧接着是成片的卷层云和高层云。
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2. When cirrostratus clouds are disturbed by planes or strong winds, the droplets can freeze instantly or evaporate, the latter of which will form the hole.
当卷层云受到飞机或强风的干扰时，水滴会立即冻结或蒸发，若为蒸发就会形成孔洞。
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3. These clouds occur within cirrostratus clouds, which are often composed of ice crystals and drops of water that are below freezing temperature but still in liquid form.
这些云发生在龙卷云中，龙卷云往往是由低于冰点温度的冰晶和水滴，但仍然保持着液态所组成。
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4. These occur in cirrus or cirrostratus clouds, which are often composed of ice crystals and super-cooled water droplets - water that is below freezing temperature, but still in liquid form.
5. These occur in cirrus or cirrostratus clouds, which are often composed of ice crystals and super-cooled water droplets - water that is below freezing temperature, but still in liquid form.
