他们没等德国人答复就接着往下推进。They went ahead without waiting for a reply from the Germans.从上往下俯瞰，山谷呈现出人形轮廓。Viewed from above, the valleys form the shape of a man.他把工序倒过来了，从上往下建房子。He works backwards, building a house from the top dow...
要确保每天的钙摄入量。Be sure you get your daily quota of calcium.钙可能有助于预防结肠癌。Calcium may aid in the prevention of colon cancer.奶制品富含钙与蛋白质。Milk products are an excellent source of calcium and protein....