压下的

Over supply and high partial pressure of oxygen can bring about toxicity effect on neurons.

在过高的氧压下，高压氧作为一种神经毒性因子发挥作用，可导致惊厥。

At this oxygen partial pressure, an excellent band-pass filters have been prepared.

并在这个氧压下，我们制备了符合工程需要的带通滤光片。

The ΔG about the reacting process has been calculated according to the reversible process .

设计了理想混合气体在等温等压条件下的可逆化学反应过程。

Crystal is silicon dioxide in ordinary temperature and pressure conditions, the crystals.

水晶是在二氧化硅在普通温压条件下的结晶体。

In this thesis, I summarize the theoretical calculation method, applied scope and notice of siphonic drainage system, and point out the advantage of siphonic drainage system compared with gravitation drainage system. In the archetype experiment study of siphonic drainage tube, I adopt different tube diameter and different structural height to survey the drainage volume and press in different place. I observe various kinds of flow state, and get chief factors which influence hydraulic peculiarity of system as the tube diameter or structural height, and find out the relevance of factor to flux. I apply CFD Fluent software and adopt standard k-ε model and RNG k-ε model, then use finite volume method and second-order upwind scheme to discrete numerical model, while coupling numeration of velocity field and press is based on SIMPLE. In the numerical simulation of curved part of tube, siphonic drainage tube experiment system and multi-outlet siphonic drainage system, I make research on internal velocity and press of system in different project condition by changing the tube diameter of curved part, negative press value in tube export and improving the quantity of water gutter. This thesis first adopts a method of combining archetype experiment and numerical simulation to study the siphonic drainage system, test and verify the validity of experiment and numerical simulation, and makefurther study on system, it solves the problems of limited testing conditions, and has a logical results, it can provide a valid method for optimizing and designing the drainage tube-net system. The conclusion have referring value for study and design of siphonic drainage system.

本文首先对虹吸式排水系统理论计算方法、适用范围以及注意事项做出总结，并分析了虹吸式排水系统的优势；再对虹吸式排水管道进行原型试验研究，采用不同管径不同立管高度，对系统流量、管道压强进行量测，观察了各种工况下的流态，对其水力特性进行研究分析，找出影响水力特性的落差、管径主要因素以及与排水量的关系；进一步应用计算流体力学Fluent软件，采用标准κ-ε模型与RNGκ-ε模型，计算过程应用有限体积法和二阶迎风格式对数值模型进行离散，速度和压力的耦合采用SIMPLE算法，分别对系统弯管段、虹吸排水管道试验系统、多斗虹吸式排水系统进行数值模拟分析，通过改变管段弯头处半径、管段出口负压值、增加雨水斗数对不同工况下系统内部的速度和压力进行研究；本文首次采用结合原型试验与数值模拟相结合的方法，对虹吸式屋面雨水排水系统进行研究，试验与模拟相互验证，并进行拓展，很好地解决了虹吸式屋面雨水排水系统由于试验条件限制问题，结果正确合理，为排水管网系统设计和优化研究提供了有效的方法，对工程设计有较好的参考价值。

The proposed method has certain referential value for the study of combined rolling schedules of the straightener.

该方法对研究矫直机各辊组合压下调整也有一定的参考价值。

By use of electrical test method, the stress on the surface of wavy plate under variouspressures was measured.

本文采用电测法，对不同内压下波面传热板板片上的应力进行了测量。

Local officials are also trying to tamp down unrest by doling out back wages.

地方官员也试图藉由发放积欠的薪资来压下社会不安。

He waited for a minute to gain his strength. Then he put the end of his tree into the ring, and pressed down the other end.

他稍停顿一下以便恢复体力，然后他把木棒的一端插入铜环里，压下另一端。

Laboratory triaxial compression tests were carried out in order to determine the stress-strain and strength characteristics of reinforced loess.

用三轴压缩试验方法研究了土工合成材料加筋黄土的应力－应变及强度特性，探讨了在各种不同加筋方式和围压下加筋机理。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。