通过吮吸铁杉幼嫩枝的汁液，树木的生长被毛茸茸的叶蝉阻碍，导致针叶从深绿色变为灰绿色，并提早掉落。
By sucking sap from the young twigs of the hemlock tree, tree growth is retarded by the woolly adelgid, causing needles to change color from deep green to grayish green and to drop prematurely.
晶种制备过程中其颜色的变化为由灰白色—灰绿色—黄绿色—土黄—深黄色。
The color of seed continuously changes with time from hoariness to celadon to olivine to khaki to deep yellow.
晶须有白色，灰白色，灰绿色，深绿色等多种颜色，其颜色变化与原料中的硅炭比值有直接关系；
There are many kinds color such as white, grey green and dark green in SiC whiskers color which directly relate to the ratio of silica and carbon in the raw materials.
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