An economical method of organizing much of the subject matter of chemical engineering is based on two facts: ①although t
答案是：化学工程师能够经济合理地组织这些项目的原因是基于如下两个事实。(1)经过工业上工艺过程的数目非常巨大,但是每一个工艺过程都可以分解为若工个由联操作的步骤,这些操作称之为单元操作。(2)每一个单元操作 且有相通的技术 并其干相同的科学原理
At given temperature and pressure, a fluid possesses a definite density, which in engineering practice is usually measur
答案是：在一定的温度和压力下,流体具有确定的密度,工程上用kg/m3表示。尽管流体的密度与温度和压力有关,但随温度和压力变化,密度的变化有大有小。如果温度和压力发生明显变化,但密度的变化很小,则该流体称之为不可压缩流体;相反,如果密度的变化非常明显,则该流体称之为可压缩流体。一般认为液体为不可压缩流体,气体为可压缩流体。不过,这种概念是相对的。如果压力和温度的变化范围非常宽,液体的密度也许会发生明显变化。有时,随温度和压力的变化气体的密度变化较小,此时气体可作为不可压缩流体对待，密度的变化可忽略不计,在工程上不会引起大的偏差。
The behavior of fluids is important to process engineering generally and constitutes one of the foundations for the stud
答案是：流体的行为对于工艺工程师来说非常重要,并且称为单元操作研究的基础内容之一。之所以说对流体进行了解是必需的,一方面是用于准确处理流体通过管道,泵,和各种工业设备的问题的需要,另一方面是出于研究热量流动和许多基于扩散和传质过程的分离过程的需要。
In metals, thermal conduction results from the motion of free electrons, and there is close correspondence between therm
答案是：金属导热源于自由电子的运动,因此导热系数与电导性是一致的。导电性较差的固体和液体,热传导源于相邻分子或原子振动引起的动量传递。气体热传导则源于气体分子的自由运动,即热量从高温区域扩散到低温区域。
句子翻译(汉译英)
在滴定中,与被测物质发生完全反应的试剂通常称为滴定剂,滴定分析就是定量测定出所消耗滴定剂的体积
答案是：Titrimetric analysis volumetrically measures the amount of reacent, often caled a titrant, recuired to complete a chemical reaction
with the analyte.
化学工程师必须开发、设计和工程化整个工艺和所需的设备,选择适当的原材料,高效、安全和经济性地运作工厂,并确保产品满足客户的要求。
答案是：The chemical engineer must develop, design, and engineer both the complete process and the equipment used; choose theproper raw material; operate the plants efficiently, safely, and economically; and see to it that products meet the requirements setby the customers.
当两个温度不同的物体接触时,热量将从高温物体流向低温物体。热量流动的净结果永远是向低温方向进行。热量传递的机理有三种:热传导、热对流和热辐射。
答案是：When two obiects at diferent temperatures are brought into contact, heat flows from the object at the higher temperature to thatat lower temperature. The net flow is always in the direction of the temperature decrease. The mechanisms by which the heatmay flow are three: conduction, convection, and radiation.
更多情况下,进料(悬浮液)需要进行预处理,以便加快过滤速度。预处理方式包括加热、重结晶或是加入过滤助剂如纤维素或硅藻土。
答案是：Oten the feed is modified in some way by pretreatment to increase the fltration rate, as by heating, recrystalizing, or adding a “filter aid" such as cellulose or diatomaceous earth.
It is an introductory text, written for undergraduate students in their junior or senior years who have completed the us
答案是：这是一部专门为大学本科三年级和四年级学生编写的教材。他们已经修完数学,物理、化学等基础课程以及化学工程导论。另外假设他们已经掌握有关物料衡算和热量衡算方面的基本知识。
Acid-base indicators (also known as pH indicators) are substances which change color with pH
答案是：.酸碱指示剂,又称pH指示剂,是颜色随pH而变化的物质
Filtration is the removal of solid particles from a fluid by passing the fluid through a filtering medium, or septum, on
答案是：过滤是一种从液体中分离固体的操作。液体通过过滤介质或隔膜,而固体则沉积在过滤介质(隔膜)上。
Any solution for which the concentration is precisely known is called a standard solution.
答案是：准确浓度已知的溶液被称为标准溶液。
In a piston pump, liquid is drawn through an inlet check valve into the cylinder by the withdrawal of a piston and then
答案是：活塞泵当活塞退后时液体通过进口活门被吸入液缸,当活塞向前运动时将液体通过出口活门压出液缸。
滤饼卸料
答案是：discharge
切线的
答案是：tangential
波动,起伏
答案是：flucation
邻近的,接近的
答案是：adjacent
振动的,振荡的
答案是：vibrating
孔
答案是：opening
陶器的
答案是：cermic
过滤,筛选
答案是：filtration
符合,一致
答案是：correspondence
构造,配置
答案是：configuration
动量,动力,要素
答案是：momentum
扩散的
答案是：diffused
滤液
答案是：filrate
目录,目录册
答案是：catalog
不连续的,间断的,中断的（_____ ）
答案是：discontinuous
reagent
答案是：试剂
specific
答案是：特定的
flask
答案是：烧瓶
precision
答案是：精密度
neutral
答案是：中性的
titrant
答案是：滴定剂
stream
答案是：溪,川,流,一股,一串,河流
streamline
答案是：流线
oxidation
答案是：氧化
equilibrium
答案是：平衡
manifest
答案是：出现,表明
titrimetric
答案是：滴定的
analysis
答案是：分析
compensation
答案是：补偿,赔偿
rotational
答案是：转动的,轮流的
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