环流，是汉语词汇，汉语拼音为huán liú，指的是回环曲折地流，即指的是在流动系统中，设法让全部或部分流体沿一定方向、一定路径循环流动。
n. circulation ; circumfluence ; circumflux
misc. ring current
The orographic effect to the humidity stratification was the most obvious. Under the top of mountain,there was inversion humidity,which formation had related with local circumfluence in valley and the mountain blocked air current.
湿度层结受地形的影响最为明显,在山脉高度以下区域维持着逆湿状况,其形成与河谷内局地环流以及山脉对气流的阻滞作用有关。
参考来源 - 祁连山南麓河谷地形云生长的层结特征The research about the bend-flow includes velocity, the distribution of velocity, slope, the distribution of flow, circumfluence of flow and the characteristic of turbulent.
弯曲型河流的水流运动研究,包括流速及流速分布、比降、流场分布、环流运动、紊动特性等。
参考来源 - 连续两弯明渠水流特性水槽试验研究·2,447,543篇论文数据，部分数据来源于NoteExpress
上新世早期的大气环流被减弱，因此垂直风切变减小，助长了热带气旋的发展。
Tthe early Pliocene had a weakened atmospheric circulation, and therefore, reduced vertical wind shear, which is favorable for tropical cyclone growth.
这些环流异常早就为人们所认识。
奈特说，“大气环流自然发生变异。”
"Variations in atmospheric circulation happen spontaneously," says Knight.
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