Unit 18 Distilling Equipment
Unit 18 Distilling Equipment
Words and Expressions Distillation n.蒸馏 distil v. Distillation --a unit operation whereby components of a liquid mixture are separated by boiling because of their difference in vapor pressure. Evaporation---removing volatile solvent from nonvolatile solute in solution. Drying---volatile liquid (usually water)are removed from solid materials
Words and Expressions Distillation n. 蒸馏 distil v. Distillation --- a unit operation whereby components of a liquid mixture are separated by boiling because of their difference in vapor pressure. Evaporation--- removing volatile solvent from nonvolatile solute in solution. Drying--- volatile liquid (usually water) are removed from solid materials
Evaporation differs from distillation in that the vapor usually is a single component,and even when the vapor is mixture,no attempt is made in the evaporation step to separate the vapor into fractions. 区别： 收集挥发组分的方法；分离难度；多组分间相互分离时的 难易程度
Evaporation differs from distillation in that the vapor usually is a single component, and even when the vapor is mixture, no attempt is made in the evaporation step to separate the vapor into fractions. 区别： 收集挥发组分的方法；分离难度；多组分间相互分离时的 难易程度
Volatility n.挥发性 Volatile adj.挥发性的，易挥发的 --(technical)(of a substance)that changes quickly into a gas petrol is a volatile substance. -(of a person or their moods)changing easily from one mood to another @a highly~personality反复无常的个性 -(of a situation)likely to change suddenly easily becoming dangerous不稳定的，易恶化的 @a highly situation from which riots (might develop
Volatility n. 挥发性 Volatile adj. 挥发性的,易挥发的 --(technical) (of a substance) that changes quickly into a gas @ petrol is a volatile substance. -- (of a person or their moods) changing easily from one mood to another @ a highly ~ personality 反复无常的个性 -- (of a situation) likely to change suddenly ; easily becoming dangerous 不稳定的,易恶化的 @a highly ~ situation from which riots（骚乱） might develop
Residue n.剩余，残留物 Residual a.残余的eg.residual pressure) ---(technical)a small amount of sth that remains at the end of a process
Residue n.剩余，残留物 (Residual a.残余的 eg. residual pressure) ---(technical) a small amount of sth that remains at the end of a process
Omit v.省略 ---~sth/sb (from sth) To not include sth/sb either deliberately or because you have forgotten it/them [syn]leave out if you are a student you can omit question 16-18. people were surprised that Smith was omitted from the team. -to not do or fail to do sth未做，不能做 she omitted to mention that they were staying the night
Omit v. 省略 --- ~ sth/sb (from sth) To not include sth/sb either deliberately or because you have forgotten it/them [syn] leave out @ if you are a student you can omit question 16-18. @ people were surprised that Smith was omitted from the team. --- to not do or fail to do sth 未做,不能做 @ she omitted to mention that they were staying the night
Skip -蹦蹦跳跳@she skipped happily along beside me.. -@the girls were skipping in the playground. --not do sth (1)---to not do sth that you usually do or should do @I often skip breakfast. @she decided to skip the afternoon's class. (2)---to leave out sth that would normally be the next thing that you would do,read,etc. @you can skip the next chapter.跳过 @I skipped over the last part of the book.略过没看 @Let's skip to the last item.跳到
Skip --蹦蹦跳跳 @ she skipped happily along beside me. --跳绳 @the girls were skipping in the playground. --[not do sth ] (1)---to not do sth that you usually do or should do @I often skip breakfast. @she decided to skip the afternoon’s class. (2)---to leave out sth that would normally be the next thing that you would do, read, etc. @you can skip the next chapter.跳过… @I skipped over the last part of the book. 略过没看 @Let’s skip to the last item. 跳到…
--change quickly] ---to move from one place to another or from one subject to another very quickly @she kept skipping from one topic of conversation to another.她始终，一再转换谈话的话题
--[change quickly] ---to move from one place to another or from one subject to another very quickly @she kept skipping from one topic of conversation to another.她始终,一再转换谈话的话题
Treatise n.论文，专著 --treatise on sth A long and serious piece of writing on a particular subject 博士论文Phd Dissertation(on sth) --a long piece of writing on a particular subject,especially one written for an university degree
Treatise n.论文，专著 --- treatise on sth A long and serious piece of writing on a particular subject 博士论文Phd Dissertation (on sth) --- a long piece of writing on a particular subject, especially one written for an university degree
Disengage v.分离，解除 ---~(sth/sb)(from sth/sb)~yourself (from sth/sb) (formal)to free sb/sth from the person or thing that is holding them or it;to become free she gently disengaged herself from her sleeping son. @to disengage the clutch(=when driving a car)(离合器) we saw the booster rockets disengage and fall into the sea
Disengage v. 分离，解除 --- ~ (sth/sb) (from sth/sb) 或 ~ yourself (from sth/sb) (formal) to free sb/sth from the person or thing that is holding them or it; to become free @ she gently disengaged herself from her sleeping son. @ to disengage the clutch(=when driving a car) (离合器) @ we saw the booster rockets disengage and fall into the sea