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 grayishgreen and to drop prematurely.
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。
2
The most densely developed areas appear white and gray, while suburban areas appear grayishgreen-a mixture of houses, streets, and lawns.
图中人口最稠密的发达地区呈现为白色或灰色，郊区则是由房屋、街道和草坪组成的灰绿色。
3
The Saliyak melange consists of dark-gray to black muddy and silty microclastic rock with intercalation of grayish purple and grayishgreen calcareous and muddy shale, marl and tuff.