If the image had been taken later in the year, when snow covers the entire peninsula, the ash plume would be difficult to see against a white background.
如果晚些时候拍摄，到积雪覆盖整座火山之后，火山烟流将在白色背景下难以看到。
His face was fresh and rosy; his hat, with its white plume, was stuck on one side, showing his curled, pomaded hair, sprinkled with fine snow.
他的面色红润，歪歪地戴着一顶饰以白羽的帽子，露出一绺绺抹了油的、撒满细雪的卷发。
Mount St. Helens vented a new column of steam October 10, a lazy plume that rose out of the crater of the snow-dusted volcano.
10月10日，一股蒸汽从圣海伦斯火山口喷发出来，这缕烟从白雪覆盖的火山口缓缓升起。
Mount St. Helens vented a new column of steam October 10, a lazy plume that rose out of the crater of the snow-dusted volcano.
10月10日，一股蒸汽从圣海伦斯火山口喷发出来，这缕烟从白雪覆盖的火山口缓缓升起。
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