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....
He lay on the beach, sifting the sand through his fingers.他躺在沙滩上用手筛砂子玩.I stood at the foot of the collapsed tower and watched the rescue workers sifting through the debris.我站在倒塌的高塔脚下，看着救援人员在瓦砾堆中搜寻。I was sifting the cinde...
Nature Gold is hosted in that as fissures ? interstice ? margin and crystal face of the Pyrite.自然金常赋存于 黄铁矿 颗粒的裂隙、晶隙、边缘及晶面上.In some particular environment or super - normal loading conditions ( eg , bath houses ) , the in...