丁

Lower toxicity or higher toxicity from mixtures than the expected depends on their constituents and potencies. It is very likely that the workers could be exposed to N,N-dimethylformamide, methyl ethyl ketone, and toluene in the occupational environments simultaneously.

在职场环境中极易同时暴露到二甲基甲醯胺、丁酮与甲苯，本研究主要目的是探讨共同暴露丁酮与甲苯不同浓度时，对於DMF暴露生物指标即尿中DMF 与尿中NMF 的影响，及探讨DMF混合暴露下对MEK生物侦测的影响。

Side-stream experiment for the removal of sec-butanol from recycle butylenes by adsorption on adsorbent PUMS-01 was carried out in a methyl ethyl ketone unit.

对甲乙酮装置循环丁烯脱除仲丁醇吸附剂PUMS-01进行了工业放大实验，实验结果表明产品性能达到了小试实验的水平。

Alcohols, ketones, esters, alcohols, ethers common media are methanol, ethanol, ethylene glycol, propanol, etc., ketones medium with acetone, methyl ethyl ketone, etc., there are a variety of methyl esters of medium, ethyl ester, ether medium with ether, ethyl ether, butyl ether, etc., they basically did not corrosive materials can be used for the specific use of the property should also be under the media and related requirements to make reasonable choices.

醇类、酮类、酯类、醚类常见的醇类介质有甲醇、乙醇、乙二醇、丙醇等，酮类介质有丙酮、丁酮等，酯类介质有各种甲酯、乙酯等，醚类介质有甲醚、乙醚、丁醚等，它们基本没有腐蚀性，常用材料均可适用，具体选用时还应根据介质的属性和相关要求做出合理选择。

"Other important glycols include 1,3-butanediol and 1,4-butanediol, used as raw materials for plastics and other chemicals; 2-ethyl-1,3-hexanediol, an insect repellent; and 2-methyl-2-propyl-1,3-propanediol, the raw material of the tranquilizer meprobamate"

&其它重要甘醇有︰1，3丁二醇和1，4丁二醇，用于制取作增塑剂和其它化妆品；2－乙基－1，3－己二醇，一种有效的驱虫剂；2－甲基－2－正丙基－1，3－丙二醇，用于制取广泛使用的镇静剂眠尔通。&

Because of this, Her meaning surpassed herself.The first part of the thesis reviews all sorts of different views in the study history about Ding Ling and draws the conclusion that the "same" critical criterions research fellow employed did not coordinate actually, then there came from misapprehensions about Ding Ling.

论文第一部分回顾了丁玲研究史上的种种错位现象，认为症结在于以往的研究者们使用的&同一&评判标准事实上并不一致，对丁玲的理解和定位也存在着偏差。

The European Council for Plasticisers and Intermediates has rejected suggestions made by NGOs last week that three further phthalates DINP, DIDP and DNOP should be added to the REACH Candidate List, alongside the three - DEHP, DBP and BBP - already on it.

非政府组织认为既然邻苯二甲酸酯、邻苯二甲酸二丁酯以及邻苯二甲酸丁苄酯已经包含在清单中，那么，DINP， DIDP，DNOP 这3种物质也应当列入其中。

As it turned out, Martin and Baldwin worked well together , with Baldwin taking most of the straight lines and letting Martin take most of the punchlines.

事实证明，马丁与鲍德温的合作算是成功的，鲍德温一直控制着正常典礼的主线，而马丁则继续着他那语不惊人死不休的德行。

The Superintendent of Schools, good old man, stopped Martin on the street and remembered him, recalling seances in his office when Martin was expelled from school for fighting.

学校视导员，一个好老头，在路边叫住了马丁。他想起了他，回忆了在他办公室里跟他的几次会见，那时马丁因为打架被学校开除了。

Cy Information Genital Wart And Pregnancy Hardin MD : Genital Wart Pictures From the University of Iowa's Hardin MD, Internet sources on genit..

外币的资料，生殖器疣及怀孕的哈丁海事处：生殖器疣图片从爱荷华大学的哈丁，海事处，互联网源对genit 。。

Employing CuI(5 mol%), N,N-dimethylglycine hydrochloride(10 mol%) and K_2CO_3(2 equiv.) in refluxing THF as the optimized reaction conditions,the four-membered 4-alkylidene-2-azatidinones could be efficiently synthesized.

当以3-溴-3-N-苯基-丁烯酰胺为底物，在5 mol%CuI为催化剂，10 mol%N，N-二甲基甘氨酸盐酸盐为配体，2当量K_2CO_3作碱，THF回流的反应条件下，可以高效的合成2-亚甲基-4-氮杂环丁酮类化合物。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐