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.
3
按摩时也不能带任何首饰以防止刮破婴儿幼嫩的肌肤。
No jewellery should be worn to prevent scratching and damaging delicate skin tissue.