习惯用语in the covert of1.在...的掩护下underthe covert of1.在...的掩护下shoot a covert1.在猎物藏身的地方射击猎物特殊用法ear coverts1.耳羽greater coverts1.大覆羽greater secondary coverts1.次级大覆羽lesser secondary coverts1.次级小覆羽lower wing coverts1.下覆羽medium coverts1.中覆羽medium secondary coverts1.次级中覆羽primary coverts1.初级覆羽upper wing coverts1.上覆羽