我在北美大草原上露天闲逛，大部分是在保护区中和私人牧场。
I roam out in the open on the Great Plains of North America, mostly in protected areas and private ranches.
讨论了几个典型的羽流流量计算公式，结合一种二区自然通风模型，建立了热分层高度、通风量和中和界高度的计算式。
Discusses several representative equations of point source plume. Establishes calculating equations of thermal stratification height, ventilation rate and neutral level based on a two-zone model.
结论经鼻蝶入路显微手术为鞍区病变术中和术后预防和修补脑脊液鼻漏的良好方法。
Conclusion Transsphenoidal microsurgical approach is a good method for the treatment of perioperative cerebrospinal rhinorrhea in sellar lesions.
结果表明：1）豫中和豫南两个烟区烟叶的烟碱含量均偏高，总氮和钾含量偏低。
The results showed that:1) The high content of nicotine, the low content of total nitrogen and potassium were found in central and south Henan tobacco-growing areas.
在某些情况下，对流单体和对流群在暖区中和暖锋前进一步排列成带状。
In some cases, cells and clusters are further arranged in bands within the warm sector and ahead of the warm front.
在某些情况下，对流单体和对流群在暖区中和暖锋前进一步排列成带状。
In some cases, cells and clusters are further arranged in bands within the warm sector and ahead of the warm front.
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