primary fissure

英 [ˈpraɪməri ˈfɪʃə(r)]

美 [ˈpraɪmeri ˈfɪʃər]

原裂

Conclusions: The poor blood supply of the posterior midline of the anal canal and spasm of the internal anal sphincter may be the main cause of the primary anal fissure which often occurs in the posterior midline of the anal canal.
结论：肛管后中线处血供不良和肛门内括约肌痉挛也许是原发性肛裂好发于后连合处的主要原因。
Primary eruptions of the anus and rectum, like perianal pruritus, eczema, anus fissure, and haemorrhoids, often impaired the local integrity of skin/ mucosa.
肛门直肠疾病如肛门瘙痒症、肛门湿疹、肛裂及痔疮等均可出现局部皮肤黏膜的破损而为人乳头瘤病毒（HPV）感染创造条件。
Primary Study on Fissure Seepage by Discontinuous Model
用不连续模型分析裂隙渗流初探
The pattern of functional activity followed a topographic representation: hand movements resulted in signal intensity changes over the lateral middle section of the primary motor cortex, whereas shoulder movements produced changes in the meddle-upper section of the primary motor cortex near the interhemispheric fissure.
激活区分布遵循躯体分布模式：手部运动激活区在初级运动皮层中段最靠近外侧，而肩部运动在初级运动皮层中上段产生信号变化，最靠近中线。
The pore types of reservoir are divided into three types such as the primary pore and secondary pore and fissure.
储层孔隙类型可分原生孔隙、次生孔隙和裂缝（隙）。