cì huán ㄘㄧˋ ㄏㄨㄢˊ 刺环（刺环） 宋 代黥刑之一。在耳后刺环形。《宋史·刑法志三》：“凡犯盗，刺环於耳后：徒、流，方；杖，圆；三犯杖，移於面，径不过五分。”《续资治通鉴·宋理宗淳祐八年》：“因极言检覈、决狱、疏决、推勘、拘锁、刺环、奏裁、详覆、重勘、追证十弊，从之。”
结果表明，单环刺消化道起源于原肠胚期内陷而成的原肠腔；
The results showed that, the digestive canal initiated from the gastrocoele, which was formed by invagination at gastrula stage.
应用组织学、组织化学和电镜技术对实验室内培养的单环刺螠虫消化道和体壁的发生及分化过程进行了研究。
The ontogenesis and differentiation of digestive canal and body wall in Urechis uniconctus was also studied using histological, histochemical and TEM methods in the laboratory.
但他们的标记是对刺，迫使爱略特进入环。
But their mark is on to the sting, forcing Eliot to enter the ring.
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