所以用库的概念定 物质流 义物质循环就是营养元素在库与库之间的转移并彼此联系起来 流通率（rate of circulation）:是指单位时间、单位面积（体积）内物质 流通率 移动的量，可用g/（亩.d）或kg/（亩.d）表示 周转率（turnover rates）:指物质出...
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the rate of circulation time 循环时间比
rate of air circulation 空气循环率
rate-of-change of circulation 环量变化率
circulation rate of postal distribution 报刊发行费率
rate of currency circulation 货币流通速度
rate of literature circulation 文献流通率
Conclusion Higher death rate of circulation system disease, malignant tu…
结论汽车驾驶员循环系统疾病、恶性肿瘤、意外死亡偏高。
Methods: 56 patients with cardiac respiratory arrest were divided into Thumper PCR group and standard CPR group. The resuscitation rate of circulation and respiration was compared in both groups.
方法：56名心跳呼吸骤停患者分为心肺复苏机cpr组、人工标准CPR组，比较两者循环、呼吸恢复率。
Laughter produces short-term changes in the function of the heart and blood circulation, increasing heart rate and oxygen consumption.
笑会造成心脏和血液循环功能的短期变化，增加心率和耗氧量。
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