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The invention discloses a method for synthesizing acetyl tributyl citrate, which uses tributyl citrate and acetic anhydride as reaction articles, uses naphthalenesulfonic acid methylal as the catalyst during the ester synthesis process, filtering the catalyst from reacted articles after reaction, water-washing, alkaline-washing, distilling the filtrate to obatin acetyl tributyl citrate.

本发明公开了一种合成乙酰柠檬酸三丁酯的方法，它以柠檬酸三丁酯、乙酸酐为反应物，在酯合成过程中用萘磺酸甲缩醛作催化剂，反应结束后，将催化剂从反应后的物料中过滤出来，滤液经水洗、碱洗、蒸馏获得乙酰柠檬酸三丁酯。

The journal publishes review articles, perspectives, articles, communications, and myology news on basic and clinical research studies in the fileds of anatomy, physiology, cell biology, biochemistry, molecular biology, gene mapping, comparative biology, development, differentiation, and regeneration, pathology, epidemiology, engineering, bioengineering, testing, pharmacology, toxicology, surgery, medicine.

杂志刊载评论文章，展望，文章，通讯，和肌肉学消息，内容涉及解剖学，生理学，细胞生物学，生物化学，分子生物学，基因图谱，比较生物学，发育，分化，和再生，病理学，流行病学，工程学，生物工程，检测，药理学，毒理学，外科，医学领域的基础和临床研究。

The journal first published in 1954, publihes original articles, case reports, review articles, contemporary issues, field surveys, journal scan, book reviews, letters to the editor, pictorial CME, quiz and calendar of events in the field of aerospace medicine and its allied disciplines, including space medicine, physiology, medicine, psychology, neuropsychiatry, biophysics, life sciences, medical electronics, aerospace engineering/technology and allied fields.

杂志于1954年首次发行，刊载原始文章，病历报告，评论文章，当代问题，实地考察，杂志浏览，书评，写给编辑的信，图示CME，事件调查和列表，内容涉及宇航医学及其相关学科的领域，包括宇宙医学，生理学，医学，心理学，神经精神学，生物物理学，生命科学，医学电子学，航空和航天工程和相关领域。

He deposited the articles of clothing on a chair, removed his remaining articles of clothing, took from beneath the bolster at the head of the bed a folded long white nightshirt, inserted his head and arms into the proper apertures of the nightshirt, removed a pillow from the head to the foot of the bed, prepared the bedlinen accordingly and entered the bed.

643他把几件衣服放在椅子上，脱掉剩下的几样。从床头的长枕下面抽出折叠好的白色长睡衣，将头和双臂套入睡衣的适当部位，把一只枕头从床头移到床脚，床单也相应地整理了一番。然后就上了。床。

2We may keep time when reading articles.3 Whenreading articles, we can point at the words with our finger orpen point and our eyes move with the finger quickly so that weare able to read very fast.

阅读时计时。3。阅读时用手指或笔尖指向文章字句并快速移动来迫使我们的眼睛快速随手指或笔尖移动来强化我们的阅读速度。

We may keep time when reading articles.3 When reading articles, we can point at the words with our finger or pen point and our eyes move with the finger quickly so that we are able to read very fast.

我们可以让时间在阅读速度当阅读文章，我们可以指着单词与我们的手指或笔尖指向和我们的眼睛很快就用手指移动，这样我们就能够读得很快。

For this systematic review, electronic searches were conducted in PubMed (of articles published between 1951 and 31 March 2006) and EMBASE (of articles published between 1974 and 31 March 2006), using various combinations of the terms "proteinuria","urinary tract infection","albuminuria" and "pyuria".

为进行这次系统回顾，我们使用"蛋白尿"、"尿路感染"、"白蛋白尿"和"脓尿"等术语，以不同组合方式在PubMed（1951 年到2006年3月31日）和EMBASE（1974 年到 2006年3月31日）两个数据库中对此间发表的相关文章进行搜索。

Article 58 Whoever imports radioactive wastes or radioactively polluted articles into the territory of the People's Republic of China or transfers them via the territory of the People's Republic of China shall be ordered by the customs to return the said radioactive wastes or radioactively polluted articles, and shall be imposed upon a fine of not less than 500,000 Yuan but not more than 1,000,000 Yuan in addition; if a crime is constituted, he/it shall be investigated for criminal liabilities.

第五十八条向中华人民共和国境内输入放射性废物和被放射性污染的物品，或者经中华人民共和国境内转移放射性废物和被放射性污染的物品的，由海关责令退运该放射性废物和被放射性污染的物品，并处五十万元以上一百万元以下罚款；构成犯罪的，依法追究刑事责任。

Therefore one day, the editor of this book thought, what if reedit the famous articles in one book and add new comments, so that the readers ever read the articles can read them again in a new mental state, looking through together with the left time, isn ' t it pleasant?

于是有一天，我们这一套书的编者便作如是想，假使将那十年前读过的名篇重编一书，新加评注，让旧的读者以新的心境再读一遍，连同已逝的韶华一并温习，不亦乐乎？

Individual silversmith s in the borderland minority nationality regions and in the coastal areas where relatives of overseas Chinese live in relatively concentrated communities may, with the approval of the People's Bank of China at county level or above and the State Administration for Industry and Commerce, engage in the making and repairing of gold and silver articles for individuals, but shall not purchase and sell gold and silver articles.

第二十三条边疆少数民族地区和沿海侨眷比较集中地区的个体银匠，经县或者县级以上中国人民银行以及工商行政管理机关批准，可以从事代客加工和修理金银制品的业务，但不得收购和销售金银制品。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？