The grey leaf—spot is one of the essential diseases of poplar.
灰斑病是杨树的主要病害。
In 1981—1987, the damage to rice of the third generation rice leaf-tier Parnara guttata Bremer et Grey larvae was studied.
作者于1981—1987年对直纹稻弄蝶第三代幼虫为害损失进行了研究。
She seemed to have powdered her face again and the lamplight gave it a grey-green tinge, rather like a black withered leaf covered with frost.
她的脸上大概又擦了粉，被灯光照得显出点灰绿色，像黑枯了的树叶上挂着层霜。
The upper leaf is green-grey in color on top, while the underside is a whitish color.
叶子的上部顶处是灰绿色，下部是发白的颜色。
The upper leaf is green-grey in color on top, while the underside is a whitish color.
叶子的上部顶处是灰绿色，下部是发白的颜色。
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