下水

Would you please shut off the water for me?

你能帮我关一下水吗？

As with autoclaves, lyophilizers should have drains with atmospheric breaks to prevent back siphonage.

与蒸汽灭菌柜一样，冻干机的下水应有液封，防止大气回流。

Based on this slipway arrangement the paper studies and analyzes the longitudinal launching technique for the.

本文就这一船台布置方案，对 1 71 8TEU集装箱船纵向下水进行研究分析。

Based on the similarity theory,mechanical analysis of the launching of ship′s slipway is carried out by means of hydraulic simulation experiment,esp.

依据相似理论，对船舶滑道下水这一复杂力学过程进行了力学分析并应用水力模拟试验的手段进行了探讨性研究，特别是就结构复杂的船架所受的水流绕流阻力的模拟做出实质性的探究。

It is rather difficult for 150, 000 ton class ship to be built and launched in the 100,000 ton class slipway.

由于该船台是十万吨级船台，十五万吨级船在此建造并下水，难度较大。

At present, more and more largetonnage ship is built with the development of ship industry, the forcebetween hull and slipway increased, some existent shipyard is not capableof building large ship. Besides, the damage of sh'ip structure and slipwaywere also reported. But the existed method for calculating ship launchingcan not solve it efficiently, so it is important to calculate shiplaunching precisely and take measure to preclude such accident.

目前随着船舶工业发展，建造船舶吨位越来越大，船体和船台之间的受力也随之增大，造成原有船台的设计能力有时已不能满足建造大型船舶需要，在实际生产过程中已有船体局部结构和船台不同程度损坏的报道，而现有的下水计算方法在有关船体和船台受力计算方面显得不够准确，如何准确进行计算并采取相应的措施来防止这类问题发生显得十分重要。

The peak currents i p and peak potentials E p of the oxidation peaks for sodium dichromate solution of different concentrations, i.e ., water under the existence of sodium dichromate, were experimentally measured at different temperatures and sweep rates v on the electrode.

实验测得不同温度、不同扫描速度 v 、不同浓度重铬酸钠溶液即重铬酸钠存在下水在电极上的氧化峰峰电流ip和峰电位Ep，建立了 i p～ v 1/2和 E p～ln v 方程，表明电极反应是主要受扩散控制的不可逆反应。

II: ① take a thin wire, one end with sand paper wipe, and then lightson alcohol to non-yellow flame ignition,② wire with the end of the water dip, and then dip a number of sodium chloride or anhydrous sodium carbonate powder,③ ignited a new spirit lamp (lamp wick is clean, pure ethanol),④ the stained sodium salt powder on the wire on the ignitiontip, when there is a sharpsmall yellow flame, which is sodium flame.

方法二：①取一条细铁丝，一端用砂纸擦净，再在酒精灯外焰上灼烧至无黄色火焰，②用该端铁丝沾一下水，再沾一些氯化钠或无水碳酸钠粉末，③点燃一盏新的酒精灯，④把沾有钠盐粉末的铁丝放在外焰尖上灼烧，这时外焰尖上有一个小的黄色火焰，那就是钠焰。

The article covers the full research on such aspects as mathematic description, numerical analysis method and their practical applications. The diphase heating surface is divided into a hot water section, a evaporation section and a micro overheat section , the problems of model switching are avoided successfully between subcritical and supercritical working condition in the model of The diphase heating surface, and the model can be used for between subcritical and supercritical working condition without causing the model stiff infinity prick up problem. The mathematical model and dynamic characteristic account is unified and predigested for the diphase heating surface of once—through boiler under subcritical and supercritical pressure, and propose that the working conditions at phase change point could be used as divide criterion between water region and steam region under supercritical pressure, the problems are solved successfully between water and steam phase change point under supercritical pressure.

本文在过程的数学描述、数值分析以及实际应用等方面进行了系统的研究分析，将双相受热面统一划分为热水段、蒸发段和微过热段三段，所建立的双相受热面模型不但成功地避免了超临界工况与亚临界工况间的模型切换，而且消除了由区段划分欠妥所引起的模型刚性无限加剧的问题，统一并简化了超临界及亚临界压力下直流锅炉双相区段的数学模型和动态特性计算，而且提出了利用相变点工况作为超临界压力下划分汽水区域的标准，解决了超临界压力下水与蒸汽的相变点问题。

A roll of the steamer aided him, and he was through, hanging by his hands.

一片肉被咬掉了，那刺痛让他想起了自己下水的原因。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。