目的探索建立无血预充兔体外循环模型的方法。
Objective To establish a rabbit model of the cardiopulmonary bypass (CPB) flushed without blood.
介绍了产品全生命周期和循环经济的概念，提出了产品的资源循环模型。
After the concepts introduction of product life cycle and circular economy, a resource circulation model is presented in this paper.
本文介绍了适应牙科医疗三个循环模型所描述的那样哈登指定的学习成果。
This paper describes the adaptation for dentistry of the medical three circle model as described by Harden to specify learning outcomes.
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