加号用于加法;减号用于减法.The plus sign is used in addition and the minus is used in subtraction.加号, 我们增加了秘方到帮助促进联合健康.Plus, we've added ingredients to help promote joint health.在较早的例子, 我们使用了加号和问号.In earlier examples, we've...
With colonic involvement, perirectal fistulae are common.累及结肠的直肠周瘘管常见.Tentorial dural arteriovenous fistulae are rare clinically.小脑幕脑膜动静脉瘘临床上比较少见.Objective To explore the angiographic appearances of the hemodynamic chang...