Exposure of unprotected skin to the sun carries the risk of developing skin cancer...皮肤没有采取任何防晒措施就在太阳下曝晒的话有得皮肤癌的危险。This leaves fertile soil unprotected and prone to erosion.这会让肥沃的土壤暴露在外，使其容易受到侵蚀。You are playing Russian r...
Conclusions The efficacy of sulindac is significant in regressing colonic adenomas of patients with FAP.结论舒林酸对FAP疗效显著,可使腺瘤明显消退.A teaching aim is the starting point and regressing point of class teaching.教学目标是课堂教学的出发点和回归点...