恒定

A fence lizard or a desert iguana—each cold-blooded----usually has a body temperature only a degree or two below that of humans and so is not cold.

因而动物之间下一个区别就是，维持体温的恒定称为恒温动物，那些体温随外界环境变化的称为变温动物。

A novel scheme of designing the LD driver based on field programmable gate array is proposed. Employing FPGA as the controlling center, all the functional modules of the LD driver, including AD/DA converting, temperature PID controlling, invariably current driving, LD protection, input and output circuit, are arranged to operate together harmoniously under FPGA.

提出了一种新型的基于现场可编程门阵列技术的半导体激光器驱动电源设计方案，该方案以 FPGA 为控制核心， LD 驱动电源的 AD/DA 转换、温度 PID 控制、恒定电流驱动、LD 保护及人机交互等功能模块电路均在 FPGA 的控制下协调工作。

Set beer as an example, the mixing turbidity could be as low as below 0.5EBC. A kind of special filter part- filter candle sticks, which are a certain number of hollow metal sticks with special structure and constant space in between each other, is one of the best filter parts till now for its high efficiency and conveniency of cleaning. It is ideal diatomite filter equipment for its small operation space, high efficiency and low running cost.

经过滤的液体能有效除去液体介质中的颗粒物质、酵母菌和其他微生物，使过滤后的介质清澈，光亮（以啤酒为例，混合浊度可达0.5EBC以下）该机采用结构特殊的过滤元件---过滤烛棒，是若干根结构特殊间隙恒定不变的空心金属棒体，过滤效率高，易清洗，是到目前为止最优秀的过滤元件之一，该机占地面积小，生产效率高，运行费用低，是最理想的硅藻土过滤设备。

The calculation model of the A reservoir dam break flood has been established.

采用Preissmann四点加权隐式差分格式对一维明渠非恒定流方程进行离散，建立了A水库溃坝洪水计算模型。

The model is applocable to the unsteady gradually varied flow during opening sluice gate.

从而得到适用于模拟闸门开启过程中渐变非恒定流的数学模型，为寻找水闸消能防冲设计参数提供依据。

The existence of unsteady flow during opening sluice gate and during a long time after opening sluice gate was proved through studying the flow in the process of opening sluice gate by using physical model.

利用物理模型对闸门开启过程中水流进行研究，证明了闸门开启过程中和全开之后一段时间内非恒定流的存在。

The valve core dynamic fixed flow balancing valves is compossed of pistons with changeable flow area,hi-presision(±5%)springs and sustaining devices. Affected by differential pressure and springs,the flow nipple will do piston movement.During the movement,the fliw area changes and the flow rate sustains at a constant value.

动态流量平衡阀的阀芯是由可变过流面积的阀胆和高精度（±5%）弹簧及支撑装置组成，受压差和弹簧的作用，阀胆的节流嘴可在阀胆罩内做活塞式往复运动，运动过程中流通面积发生改变，从而使流量维持在恒定值。

By a Law of Nature with us, there is a constant attraction to the South; and, although in temperate climates this is very slight -- so that even a Woman in reasonable health can journey several furlongs northward without much difficulty -- yet the hampering effect of the southward attraction is quite sufficient to serve as a compass in most parts of our earth.

我们这儿有一条自然法则，南方有恒定的引力；尽管是在温和的气候下，这种引力非常微弱--因此即使是一位妇女，只要健康状态良好，也能向北方旅行数弗隆，这完全没问题--但是，在地球上的大多数地方，南方引力的阻碍作用也足够定向了。

The application of the alloy that can effectively reduce the release of hydrogen, the special technique in manufacturing grid, and the appropriate match of active materials of both negative plates and positive plates, all these enable spiral valve-regulated sealed lead-acid battery, greatly restrain the release of hydrogen from negative plates, at the same time the generated oxygen, due to overcharge of positive plates, arrive at negative plates through the diaphragm and compose with lead in the negative, thus enable the recombination of gas inside of the battery and prevent the case of water loss so that water addition is free.

选择特点：有较高的放电电压曲线，使用环境宽松，能完全释放能量，适用于1min以内的支撑时间，与GCplus15配合使用，可保障变频器恒定的直流电压。卷绕式阀控密封铅酸蓄电池通过采用具有极高析氢过电位的合金通过特殊工艺制造板栅，同时对正负极活性物质量的合理匹配等工艺措施，使得负极上发生的析氢过程得以最大限度地受到抑制，同时正极因过充电所产生的氧气通过隔膜到达负极，并与负极上的铅发生反应，生成水，这样便使得电池内部气体的再复合，防止失水，实现免维护。

A gas at constant pressure contracts as the temperature is decreased.

当温度下降时，气体在恒定压力下会跟着收缩。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。