翻译一个句子

Subtle and sensitive is a major feature of the Chinese people.Thus advertisements broadcast in the Chinese market should be as much as possible the performance of products in a subtle way the value and intrinsic beauty, while trying to avoid "Every potter praises his own pot."

傅克烷基化反应活性怎么判断

题目：

傅-克反应卤代烃酰卤活性问题! 邢大本说：傅-克反应烷基化卤代烃活性FClBrI,酰基化酰卤活性IBrClF,活性为什么是相反的? 大虾们分不是问题 是因为机理不同吗 但是烷基化也可以由c正离子历程啊

答案：

March上面有介绍酰基化酰卤活性IBrClF并不是绝对的,原因可能是在形成Wheland中间体后,进一步形成产物时,I的离去能力更强,C-I键能也最小,所以I活性更高,至于烷基化,可能是由于F的体积较小,配合M的能力较强,导致更易形成R+,所以F活性更高 LZ可参考以下文献 1、Challoway.N.O,JACS,59,1474(1937) 2、Brown and Jungk,JACS,77,5584(1955) 3、Yamase,Bull,Chem,Soc,Jpn,34,480（1961） 4、Corrio,Bull,Soc,Chim,Fr,821（1965） 文献1中的描述 We have found that for the acyl halides the order of activity for the halogens is as might be expected, I Br C1 F. The extreme sensitiveness of acetyl iodide to aluminum chloride caused a marked decomposition but did not materially interfere with the determination. For the alkyl halides the surprising order found was FCIBrI. In fact, the iodine was so inert that n-butyl iodide did not react with benzene in eighteen hours in the presence of aluminum chloride at 29°C, though the other halides reacted at rapid rates at lower temperatures. It is also of interest to note that the n-butyl iodide was stable in the reaction and was recovered unchanged.

雨露学习互助

female这咋么读

female ['fi:meil] female ['fi:meil]

adj.

1. 雌的，阴性的，女性的

2. 女的，女子的，妇女的

3. 【机械学】阴的，内孔的，凹形的(指接头配件、插座等)

4. 【植物学】

雌性的

雌蕊的

5. [废语]女子气的，纤弱的

n.

1. 女人，妇女或女子

2. 【动物学】母兽，母畜；雌鸟；【植物学】雌性植物，雌株[参较male]

近义词:

feminine . womanly . womanish . effeminate . ladylike .

反义词:

male . masculine . manly . mannish .

female ['fi:meil]

n.

1. an animal that produces gametes (ova) that can be fertilized by male gametes (spermatozoa)

2. a person who belongs to the sex that can have babies

adj.

1. being the sex (of plant or animal) that produces fertilizable gametes (ova) from which offspring develop

a female heir female holly trees bear the berries

2. characteristic of or peculiar to a woman

female sensitiveness female suffrage

3. for or pertaining to or composed of women or girls

the female lead in the play a female chorus

以上来源于: WordNet

空心胶囊的英语简介：

Introduction:

Empty (Vacant) capsule is one of the most common choices for medicine filling, and it has acquired an important position in the industry of medicine manufacture. Since the quality and material of the vacant capsules directly affects the effect and safety in medicine usage, our factory has always been searching for new and good material to improve the quality of the capsule shells, and try to make the best products to our customers.

The empty capsule is a kind of capsule shell with designated colors (prepared at the specific requirement of the customer) and shape made of gelatin as main material. It is usually used as the special packing for those medicines or health products with bad **ell, light sensitiveness or labialisation in wet or hot conditions. No bond or additional pressure is required in producing capsules with vacant capsules. In addition, the specific capsules are easy to disintegrate in the gastric juice. Compared with tablets and pills, the capsules can offer a better bioavailability and other advantages in convenient preparation, carriage and usage and safe airproof packing.

Vegetable（cellulose） capsules（植物胶囊）, different from the traditional glutin capsules, are made of HPMC(hydroxy, propyl, methyl and cellulose) with the basic elements of polysaccharides and plant cell wall. In addition to its advantage in natural concept, it can also promote the absorption and digestion of albumen, fat and carbohydrate, which absent in the traditional glutin capsules. Along with the growing of vegetariani** and the sense of health protection, as well as the influence of the religion etc., the natural vegetable capsule products are rising to the leading position in its industry.

Vegetable capsule is made of HMPC by new technique, it’s a natural high-tech product.

Unlike gelatin capsules, vegetable capsules are made from natural plant cellulose in order to satisfy vegetarian and cultural lifestyle needs. While retaining all the advantages of traditional gelatin capsules, vegetable capsules also starch-free, gelatin-free and contains no preservatives. It does not need to be sterilized with ethyleneoxide.

HPMC(hydroxy, propyl, methyl and cellulose) is made of plant cellulose. It has been widely applied in food, co**etics and pharmaceutics industries all over the world. HPMC used to produce veg-capsules meet USP/BP standard.

Veg-capsule can also be colored by natural edible colorants, and imprinted with natural printing inks to identify your products in the market. Besides, veg-capsules run **oothly on all kinds of hgh speed and semi-automatic filling machines.

The gastric coated capsules (胃溶胶囊) is a kind of capsule shell with designated colors (prepared at the specific requirement of the customer) and shape made of gelatin and gastric coating as main material. It is a capsule designed with specific target, it’s disintegrating quickly in the gastric juice. It's usually used in the packing of the medicines or health products with excitation to the stomach, labialisation in acid environment or specific requirement to disintegrate in the gastric juice to take effect. The specific gastric-oriented capsules help to promote the effect with a less dosage while reducing the adverse reaction, which is convenient for the patients. In addition, it helps to reduce the degradation to the medicine or health products caused by oral application and supply the best place for absorption.