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[生理]大循环，[生理]体循环
1、circulation desk───借还书处；图书借还台
2、greater efficiency───更高的效率
3、greater than───[数]大于
4、circulation saw───循环锯
5、greater───adj.较大的（great的比较级）
6、circulation system───环流XiTong；[医]循环XiTong；流通体系；流通体制
7、circulation───n.流通，传播；循环；发行量；（图书的）借出
8、circulation area───[建]流通面积
9、circulation definition───循环定义
1、The advantages of forced circulation and indirect heating are lowered steam costs through return of condensate to boilers, lower liquor volumes, and greater uniformity of cooking.───强制循环和直接加热的方式的优点是通过回用冷水使耗汽量，耗水量降低、并使蒸煮更加均匀。
2、Working stations merge with circulation spaces in order to generate a greater link among building users.───车间和循环空间合并以便在建筑的用户间产生更大的链接。
3、To increase circulation, and thus our profits, we should therefore consistently devote a greater proportion of space in all editions of The Clarion to coverage of local news. 121.───为了增加发行量以及利润，我们应该在Clarion的所有版本中稳定的提供较大的版面给本地新闻。