二种环节动物皆具有闭锁循环系，包括管状的心脏及背血管，腹血管。用大头针标示二标本的下列构造：。
Both annelids possess a closed circulatory system with tubular hearts and a dorsal and ventral blood vessel. In both specimens, pin the following.
一部分冷却的粗煤气循环至气化炉用于煤闭锁式料斗的再压缩。
A portion of the cooled raw gas is recycled to the gasifiers for repressurization of the coal lock hoppers.
结论：先天性食道闭锁修补术的合理麻醉处理应包括充分的术前准备、严格的呼吸循环管理及严密的监测。
Conclusions: The keys to anesthetic management for esophageal atresia repair are strict respiration-circulation management, rigorous monitoring, and sufficient preparing is also important.
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