目的：研究离体作功心脏对其冠脉压强变化的反应。
Objectives: To study the reaction of the isolated working hearts of rats when the coronary pressure is changed.
冠型为家禽的品种特征之一，不同品种的鸡其冠形也有各自的特点和形状。
The comb type is one of domesticated fowl's traits, and combs of different ckicken breeds have different characteristics and shapes.
“中优9507”各施氮处理不具“京冬8号”的规律性，但其冠层含水率与冠层温度也呈负相关。
There were different regularities in all nitrogen treatments of "Zhongyou 9507" to those of "Jingdong 8".
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