牙斑如果不清除就会导致牙齿蛀蚀和牙龈疾病。When not removed, plaque causes tooth decay and gum disease.莫妮卡拿起她的伯罗圆珠笔，放在牙齿间转动着。Monica picked up her Biro and revolved it between her teeth.它猛地朝我的脚脖子咬下去，牙齿还咔咔直响。His teeth clicked as he snapped at m...
Nothing but a great many epithelial cells was observed in the stain.染片中只观察到有大量的上皮细胞....a black stain.黑色污迹A dark red stain was spreading across his shirt.一块深红色的污渍正在他的衬衫上渗开。PAS stain Histoplasma capsulatum infection in the...
当生活很艰难，你想要放弃的时候，请记住，生活充满了起起落落，如果没有低谷，那站在高处也失去了意义。When life gets hard and you want to give up, remember that life is full of ups and downs, and without the downs, the ups would mean nothing.友情是理解，不是妥协；是原谅，不是遗忘。即使不联系，感情依然在...
Hedgehog Fungus is rich in protein, fattiness , carbohydrate and many kinds of vitamins necessary for human.含有丰富的蛋白质 、 脂肪 、 碳水化合物及人体所需的多种维生素等.Being with much protein, aminophenol, mineral and microelement but little fatt...