那条老狗的口鼻部分有灰斑.The old dog had a grizzled muzzle.灰斑对橄榄褐土场.Grey patches on an olive drab field.灰斑病菌在抽丝期期间或结束后损害叶片,导致严重减产.Gray leaf spot damages leaves at or just after silking stage and causes severe yield reduction....

“灰斑”的英语可以翻译为：greyness （钢板酸洗缺陷） ...