The onset may not be accompanied by any of the acute signs but may appear insidiously . 发病时可能不伴有任何急性症状，但可能隐匿地出现。
Acute inflammation of the vermiform appendix is the most common surgical lesion within the abdomen . 阑尾的急性炎症，是最常见的外科腹部病变。
Acute sinusitis is usually initiated by an acute respiratory tract infection of viral etiology . 急性鼻窦炎常常是由病毒性病因的急性呼吸道感染而发生。
Acute respiratory insufficiency in the postoperative patient may be caused by defective ventilation . 手术后病人的急性呼吸功能不全，可因不足的通气所引起。
Between these episodes, subacute abdominal pain is manifest and the horse may assume a sitting-dog position . 在这些间歇期，可出现亚急性腹痛，马可呈犬坐姿势。
Cholelithiasis may be associated with present or past episodes of either acute or chronic cholecystitis . 胆石症可能与现在和过去的急性或慢性的胆囊炎发作有关。
The pain of angina is usually not as severe as the intense precordial crushing sensation associated with acute myocardial infraction . 心绞痛性疼痛，通常不如急性心肌梗塞时心前区挤压感觉那样剧烈。
A direct relation between the acute inflammatory response after injury and the initiation of repair has been recognized for generations . 损伤引起的急性炎症反应和修复开始之间的直接关系已为几代人所认识。
The acute symptoms of contact of beryllium with the mucous membrane of the eye and upper respiratory tract include itch, and rhinorrhea . 眼睛粘膜和上呼吸道粘膜若接触铍，其急性症状是发痒、灼烧和流鼻涕。
Pigs should not be moved or transported during the acute stage of the disease in order to avoid additional embarrassment to the respiratory system . 在疾病急性阶段对病猪不应移动或运输，以免增加呼吸系统的额外负担。
