Because of their simplicity, bipolar lead systems were the first to be used in clinical electrocardiography.因为它们简单, 双极导联最先用于临床心电图学.Objective To study electrocardiography diagnosis of ischemia in patients with ventricular...
The white sails billow with the breezes they catch.一张张白帆随着微风舞动。They skip rope and play catch, waiting for the bell.他们又是跳绳，又是玩接球，等着上课铃声响起。Most late developers will catch up with their friends.大多数身材发育迟缓者都会赶上他们的朋友。...
守着水的地方要多养鱼.Where there is water nearby, make a special effort to breed fish.淡水养鱼大有可为.There are bright prospects for freshwater fish farming.他们在水库养鱼.They breed fish in the reservoir....