他勉强能看到柜台后面的小个子男人。He could just about see the little man behind the counter.他赢了，但是赢得十分勉强。He won, but only by the skin of his teeth.他靠用货车卖薄饼勉强度日。He made a living of sorts selling pancakes from a van....
Histiocytosis associated with disturbance of cholesterol metabolism, occurs chiefly in young children.与胆固醇代谢障碍有关的组织细胞增多症, 通常发生在年轻人身上.Skin biopsy and immunohistochemical study confirmed the diagnosis of Langerhans cell hi...
目前，30%的爬行动物、鸟类和鱼类面临灭绝的危险。30 percent of reptiles, birds, and fish are currently threatened with extinction.牛奶、油性鱼类和鸡蛋都含有维生素D.Milk, oily fish and egg all contain vitamin D.彼得·福雷是自然历史博物馆鱼类化石展厅的负责人。Peter Forey is curator of ...