化工专业翻译（不要软件翻译）？ heat transfer to a boiling liquid occurs so often that it is considered an individual operation. it is called evaporation. 热传递到某一沸液的现象因为时常发生而被认为是一个独立的工艺过程，这个过程被称为蒸发。 the objective of evaporation is to concentrate a solution consisting of a nonvolatile solute and a volatile solvent. in the overwhelming majority of evaporations the solvent is water. evaporations conducted by vaporizing a portion of the solvent to produce a concent rated solution or thick liquor. 蒸发的目的是浓缩某一由非挥发性的溶质和挥发性的溶剂组成的溶液。在绝大部分的蒸发过程中溶剂往往为水。多次蒸发通过部分溶剂的气化而完成，产生浓缩液或厚浆。 evaporation differs from drying in the residue is a liquid — sometimes a highly viscous one — rather than a solid, it differs from distillation in that the vapor usually is a single component, and even when the vapor is a mixture, no attempt is made in the evaporation step to separated the vapor into fractions; 与干燥过程不同，蒸发残留物为液体（尽管有时是非常高粘度的液体）而非固体。与蒸馏过程不同，蒸发蒸汽相通常为单组分，而即使蒸汽相是混合物，在蒸发阶段中也并不会去尝试把这混合物的蒸汽相分离成各种馏分。 it differs from crystallization in that emphasis is placed on concentrating a solution rather than forming and building crystals. in certain situations, e.g., in the evaporation of brine to produce common salt,the line between evaporation and crystallization is far from sharp. evaporation sometimes produces a slurry of crystals in a saturated mother liquor 与结晶过程不同，蒸发强调是溶液的浓缩，而不是成晶和造晶。但在某些情况下，例如当用盐水蒸发来生产普通食盐时，蒸发和结晶之间的界线也远非泾渭分明。蒸发有时会在饱和的母浆中产生结晶浆液。查看更多
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