查询词典 low-cost

By rational configuration of the low voltage solid circuits and hydrogen thyratron circuits,long precise delay and low jitter of high voltage output can be obtained.

采取低压固体电路与大小氢闸管电路的合理配置，较好地解决了精密长延迟和高压脉冲输出时低延迟时间晃动的难点。

According to the H NMRstudy, it was found that the protons on the cyclopentadienyl ring of 〓 were not splitted, but when one proton on the cyclopentadienylring was substituted by methyl, that is in〓 complexes, thefour protons on the ring were splitted into four groups,the 〓 between the onesignal and the others is large, the total splitting is over 2ppm. The splittings werealso affected by the halides linked with the titanium, they increase according to theorder of CI, Br, I. By the study of the 〓 Sn NMR, it is found that the chemicalshifts of 〓 are present in low field. It is assume that the large space strain causesthe angles of the tin linked with ligands deviate from the normal tetrahedral anglesresults low field shift for 〓Sn. And by MS study,there were no molecular ions for 〓 complexes in the spectra. However, for 〓 when X=CI,Br,NCO and Ar is tolyl or phenyl group,there were molecular ions,but theirabundances were very small,and no that for the iodide was found.

钛上的卤素对茂环氢的裂分也有影响，依〓，Br，I顺序，卤素对茂环氢的裂分依次加大；通过对〓的研究发现，以上这些化合物〓的化学位移都出现在低场，认为大的空间张力造成的锡的键角偏离正常的锡的四面体键角是造成〓化学位移出现在低场的原因；对这些化合物质谱的研究发现，〓系列化合物得不到分子离子峰，而〓系列的化合物，当X=〓，NCO和苯环上不带取代基或只带甲基时，则出现分子离子峰，但丰度很低，而相应的碘化物和其它化合物则没出现分子离子峰。

But at the same time we can see that China's export products there is a low technological contents, and low added value, the drawbacks of the irrational structure of export commodities, China and trade power has a big gap.

但同时可以看到，中国的出口产品存在着技术含量低、附加值低、出口商品结构不合理的弊端，中国与贸易强国有很大的差距。

Combining with the production control of low-alloy steel with niobium , the main reasons of surface transverse crack of low-alloy steel slab with niobium were put forward.

介绍了铌元素的作用和行为及在常见钢种中的作用，结合含铌低合金钢的生产控制，分析出造成含铌低合金钢连铸坯表面产生横裂纹的主要原因，并采取相应的技术措施，提高铸坯表面质量。

We Investigated the species of diseases and insect pests, species of natural enemies, distribution and dominant species in export vegetable bases in Shandong Province. Dynamics of main diseases and insect pests were studied.2. We investigated the main control technologies for diseases and insect pests, types and application methods of pesticides.3. Effects of crop varieties, fertilities and cultivation on diseases and insect pests, production and pesticide residues were examined.4. Control effects and application technologies of frequency trembler grid lamps, greenhouse ozone machine and insect-proof net were tested.5. By research, seven biological preparations and twelve chemical pesticides with high activity, low toxicity and low residue were screened.

主要结果如下：1查清了山东省出口蔬菜基地蔬菜病虫害发生种类，天敌种类、分布、并评价上风种；探明了主要病虫发生消长规律。2查清了山东省出口蔬菜基地目前病虫害防治的主要应用技术、施药种类及主要施药方式。3明确了作物品种、肥力、栽培方式等农业措施对病虫发生、产量和农残的影响。4明确了频振式杀虫灯、温室病害臭氧防治机、防虫网等物理措施防治效果及其应用技术。5通过实验，筛选出7种生物制剂和12种安全有效低毒低残留化学农药品种。

Results Cardiac functions recover to grade Ⅰ in 25 cases,grade Ⅱ in 6 cases,postoperative low-grade reflux of mitral valve in 12 cases,low-grade reflux of tricuspid ...

结果25病人心功能恢复到I级，6例II级。12例病人术后二尖瓣轻度返流，4例三尖瓣轻度返流，1例二尖瓣中重度返流。

The thesis reports the magnetic properties of paramagnetic light rare earth trifluoride NdF_3 under low temperature and the high magnetic field by using quantum theory. The theoretical quantitatively results are compared with the experimental ones, in order to probe into the theory of the microscopic mechanism of magnetization of substance when the temperature is low and applied magnetic field is high.

本论文用量子理论对顺磁材料NdF_3在低温、强磁场作用下的磁特性进行了理论研究，并将其结果与实验进行了比较分析，探索材料在低温、强场的情况下磁化的微观机理。

The low voltage breaker is composed of electric conducted system,extinguish-arc room, heat tripper and electric magnetism wink-moved mechanism.The functions of move mechanism directly impact the reliability of breaker's move. This topic is imported by using the exchange module of multibody dynamics simulation software automatic dynamic analysis of mechanical system,and then its movement was simulated by applying ADAMS,with the design and the optimization of DW16 Low-voltage breaker's ususal mechanical movement.

摘 要：低压断路器由导电系统、灭弧室、热脱扣器和电磁式瞬动机构组成，其中操动机构的性能直接关系断路器动作的可靠性，本课题利用Pro/E对操动机构进行三维实体造型，然后将利用多体动力学仿真软件ADAMS进行仿真，完成对DW16型低压断路器的常用操动机构的设计和优化。

Spoken Poetry article from the network of morphological characteristics, the causes of oral sex, and oral performance, the ultimate meaning and limitations of folk poetry and network position, low-poem "waist" to explain the two major aspects of the language require the trivialization of poetry Poetry and its network is now moving toward the development of a civil position of stability and low-poem "waist" of the boom.

文章从网络诗歌口语性形态特征、口语性的成因、及其口语化的表现、最终的意义与局限和网络诗歌的民间立场、低诗"下半身"走向两个大方面阐释出诗歌语言的庸常化及其现在网络诗歌的一种发展走向，民间立场的稳定和低诗"下半身"的热潮。

A high/low temperature the price is high/low do/try one's best to do sth.

高/低温低温价格高/低价格高低努力/尽力做某事 27。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。