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Used CFD software FLUENT, the three dimensional simulation to piston windorganization at the mine transportation drift were studied. The speeds, static pressuredistribution map at various characteristics sub-plane under different condition were obtained.The entire flow field was divided to different sub-area. The speeds, static pressure changingtendency at the typical position were analyzed. Mechanics origin of the piston wind wasdiscussed.

7采用计算流体力学软件FLUENT对矿井运输巷道内活塞风的风流组织进行了三维数值模拟，得出了不同状态下各特征子平面上的速度、静压分布，并对巷道内空气流域进行了分区，分析了典型位置上的速度、静压变化趋势，探讨了活塞风形成的力学原因。

In view of the improper matching of the strength-toughness for domestic petroleum drill pipe sub,the influence of the chemical compositions and metallurgical quality of 37CrMoE steel used for drill pipe sub on its mechanical properties,as well as the effect of the metallurgical quality on the hardenability,were analyzed.

针对国产石油钻杆接头存在强韧性配合不良的问题，试验研究了钻杆接头用37CrMoE钢的化学成分和冶金质量对其力学性能的影响，以及冶金质量对淬透性的影响。

This paper sets up the simulator of VAV air-conditioning system using TRNSYS as the platform. The simulator simulates the dynamic performance of the VAV air-conditioning system (including air sub-system and water sub-system) including its local control loops and building. The parameters of airside of VAV system are obtained by experiment in real building system.

本文首先从变风量空调系统中各空调设备和控制部件的仿真入手，以TRNSYS作为软件平台，通过实验的方法获取风侧必要的参数，从而建立起可以模拟变风量空调系统及其常规下位机控制回路运行和控制特性的数字仿真器。

Obtain of transgenic sub-generation seedlings: Altergether there were 892 seeds of 52 transgenic seedlings.Partial seeds bourgeoned and transgenic sub-generation seedlings were obtained.

4转基因株系子一代的获得：获得52个转基因株系的种子总共892粒，将部分种子萌发，培育成小苗，经组织化学染色和PCR鉴定，证实外源基因已遗传至子一代。

To avoid loss of drilling tools and even well abandonment due to downhole fire or explosion during air drilling in pay zones, we developed a novel downhole fire or explosion prevention sub, a kind of downhole tool made of low melting-point alloy, designed to shield off oxygen so as to put out fires. This sub is connected to the upper part of dill bit.

为了解决空气钻井在钻遇油气层时，发生井下燃爆，造成埋钻具、井眼报废等复杂情况，基于阻断氧气使火熄灭的思路研制出了一种低熔点合金制造的井下工具－空气钻井燃爆灭火阀。

To avoid loss of drilling tools and even well abandonment due to downhole fire or explosion during air drilling in pay zones, we developed a novel downhole fire or explosion prevention sub, a kind of downhole tool made of low meltingpoint alloy, designed to shield off oxygen so as to put out fires. This sub is connected to the upper part of dill bit.

为了解决空气钻井在钻遇油气层时，发生井下燃爆，造成埋钻具、井眼报废等复杂情况，基于阻断氧气使火熄灭的思路研制出了一种低熔点合金制造的井下工具--空气钻井燃爆灭火阀。

In wetter habitats, forbs were more abundant and accounted for the majority of aboveground biomass, whereas grasses became more important in dryer habitats. Shrubs and sub-shrubs increased with decreasing soil water availability and their relative biomass rapidly increased in degraded steppe and sand dune; perennial grasses had significantly higherδ〓C values than other PFGs; the δ〓C values of perennial grasses and forbs increased with decreasing soil water availability, while those of shrubs/sub-shrubs showed an inverse trend.

在较湿润生境，多年生杂类草更加丰富并构成了群落地上生物量的绝大部分；而在较干旱生境下，多年生禾草在群落中起更重要的作用；随着土壤含水量下降，灌木和半灌木逐渐增多，且在退化草地和沙地中其相对生物量迅速增加；多年生禾草δ〓C值显著高于其它功能群；随着土壤水分可利用性降低，多年生禾草和杂类草的δ〓C值表现出增加的趋势，而灌木/半灌木则表现出相反的趋势。

Established a sub-standard time mode of the woman 400m Hurdlers provided the scientific and practical quantitative reference for the diagnosis, evaluation of athletes in training and competition of the sub-allocation of time and the change of speed.

建立了女子400m栏运动员分段时间模式标准，为诊断、评价运动员训练与比赛中各分段时间分配和速度变化的合理性，提供了科学、实用的量化参考依据。

Cutting Products has the main blade blade, paper cutter sub-divided into paper and single-pole, grinding wheel, slotting machine knives, veneer cutting blade, cutting blade on three sides, rotating cutting knife, cross-cutting knives, cylindrical toilet paper cutter, sub - knife-cut from top to bottom, leather upper and lower knives, leather cutter, cutting knife, cut circle engraved blade, cut pipe cutter, bowl blade, Introduction paper, cutting knives, meat slicing knives, vegetable knife slices, ham thin knife, round plate rolling scissors, slitting Slitter knives, cutting blade, bearing knives, knife lap, multi-blade knife ring, butterfly knives, flower asbestos knives, copper foil cutting knife, foil cutter, cutting knife PCB , PP cutting knife, cut the foot blades, blade shearing machine, rolling blade, steel cutting knives, knives broken scrap, plastics crushing knives, pelletizing knives, pelletizing hob, hob pelletizing alloys, rubber blade, closure at the end of knife, bag machine knives, even the volume BAG blade, plywood blade, woodworking planer knives, slicer knives, punching machine blade, scissors fly films, scraper, blade coating,±Series, tungsten steel blades, tungsten steel round blade, cemented carbide paper knife, three holes blade, chemical fiber blades,knives, profile knives, cutting knives, such as cloth-like, non-standard blade can be customized.

主要刀片产品有切纸刀片，分纸刀，分纸单刀及砂轮，开槽机刀，单板切纸刀片，三面切纸刀片，旋转切纸刀，横切刀，圆筒卫生纸切刀，分切上下刀，皮革上下刀，皮革裁刀，切光刀，切刻圆刀片，切管刀，碗刀片，导纸片，模切刀，羊肉切片刀，蔬菜切片刀，火腿薄切刀，圆盘滚剪刀，纵剪分条刀，切条刀片，轴承刀，光刀圈，多刃刀圈，蝶形刀，石棉瓦花刀，铜箔裁切刀，铝箔切刀，线路板裁切刀，PP裁切刀，切脚机刀片，剪板机刀片，轧钢刀片，钢筋剪断刀，废钢破碎刀，塑料粉碎刀，切粒刀，切粒滚刀，合金切粒滚刀，橡胶刀片，底封刀，制袋机刀，连卷袋刀片，胶合板刀片，木工刨刀，切片机刀，冲剪机刀片，飞剪刀片，刮刀，涂布刮刀，薄刀系列，钨钢薄刀片，钨钢圆刀片，超硬合金裁纸刀，三孔刀片，化纤刀片，切布刀，齿形刀，样布裁切刀等，非标刀片可定制。

Set: The Bronze Drum Tower drain system would most exquisite moment, Gu Lao legend, so that the first Sung objects, their system, copper Louhu 4: the Yue Heavenly Lake , sub-Yue levellers , but also sub-Yue extreme , the next reads close the water.

答：集：青铜鼓楼排水系统将最精致的时刻，辜老的传说，让第一个宋代的对象，他们的系统，铜Louhu 4：乐天池，次乐平水，而且还分乐极端，下一个读取的密切的水。

I can not negligent, he should do what?

我不能不在意了，他要做什么呢？

It is very dangerous to swim in the river alone.

一个人到河里游泳是很危险的。