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.

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。

youdao

The tree sap in early spring; the new-born green leaf, soft and fresh as skin;

VOA: special.2010.02.27

The line is based on antioxidant-rich green tea, bamboo sap, and red ginseng, which the company cultivates at its own farms on Jeju Island off the coast of Korea.

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