之前做另外一个公司的试译，中译英部分被否决，很打击我的自信心。所以这回把试译稿发上来，想请大家指点一下问题在哪里。这一段300多字的文章只有一个句号，所以我就自作主张断句了。


精密称取供试品适量，置皂化瓶中，加乙醇30 ml与50%氢氧化钾溶液3ml，置水浴中煮沸回流30分钟，冷却后，自冷凝管顶端加水10ml冲洗冷凝管内壁，
An appropriate amount of the sample is accurately weighed into a saponification flask, and mixed with 30 ml ethanol and 3 ml of 50% potassium hydroxide solution. The mixture is boiled with circumfluence in a water bath for 30 minutes. After cooling, 10 ml water is added at the upper end of the condenser pipe to wash its inner wall.


将皂化液移至分液漏斗中，皂化瓶用水60——100ml分数次洗涤，洗液并入分液漏斗中，用不含过氧化物的乙醚振摇提取4次，每次振摇约5分钟，第一次60ml，以后各次40ml，合并乙醚液，用水洗涤数次，每次约100ml，洗涤应缓缓旋动，避免乳化，直至水层遇酚酞指示液不再显红色，
The saponified liquid being transferred to a separatory funnel, the saponification flask is washed several times with a total of 60-100 ml water, which is combined with the saponifed liquid later. 60 ml aether devoid of peroxide is added into the separatory funnel to extract the solution after 5 minutes of shaking. The same extraction process is repeated for three times, let alone the volume of aether being reduced to 40 ml each time. Collected aether extracts are washed a few times with water, about 100 ml each time, while being whirled slowly in order to prevent emulsification, until the water layer does not turn red with phenolphthalein indicator.


乙醚液用铺有脱脂棉与无水硫酸钠的滤器滤过，滤器用乙醚洗涤，洗液与乙醚液合并，放入250ml量瓶中，用乙醚稀释至刻度，摇匀；
The aether extracts are filtered with absorbent cotton and anhydrous sodium sulfate. The filter is washed with aether, which is combined with the extracts into a 250 ml graduated flask later. More aether is added into the flask until its graduation line is reached, and the solution is shaked to unification.


精密量取适量，置蒸发皿内，在水浴上低温蒸发至5ml后，置减压干燥器中，抽干，迅速加异丙醇溶解并定量稀释制成每1ml中含维生素A9——15单位，照分光光度法，在300nm、310nm、325nm与334nm四个波长处测定吸收度，并测定吸收峰的波长。
An appropriate amount of the solution is accurately measured and transferred to an evaporating dish, evaporated at a modest temperature in a water bath to a volume of 5 ml, then placed in a vacuum desiccator and suctioned off. Isopropyl alcohol is swiftly added to solve the residue and the resulted solution is quantitatively diluted to contain 9-15 units of vitamin A per ml. The absorptance of the dilution at 300nm, 310nm, 325nm and 334nm is determined by spectrophotometry. The wavelengths of absorption maxima are also determined.