目的：探讨双胎儿童的产次、出生体重与脑瘫发病率之间的关系。
Objective: To explore the relationship between cerebral palsy and the parity, birth weight in twins.
四氢萘加氢裂化反应的关键步骤和双环化合物裂解的转化率以及单环化合物的产率与两种催化剂担体的酸性及反应温度有关。
The key steps of hydrocracking of tetralin, the conversion of double ring compounds and the yields of mono-ring compounds were affected by the reaction temperature and the acidity of two catalysts.
在乙腈溶剂中，碳酸钾存在下，双咪唑啉和1，2-二溴乙烷进行扩环反应，得到环状中间体一溴盐，产率78。
The reaction of bis-imidazoline with 1,2-dibromoethane and potassium carbonate in acetonitrile provided monobromide salt with a yield of 78.
结果双胎妊娠妊娠期、产时和产后并发症多于单胎妊娠，胎位是决定分娩方式的主要因素。
Results Twin pregnancy had more complications than singleton during in labor and puerperuim Conclusions Antenatal care should be enhanced in twin pregnancy.
本文首次采用碘释放法发现双束脉冲超声辐照的空化产率增强效应。
This treatise first reveals the enhancement of cavitation yield of bi beam ultrasound irradiation.
研究了恩施双河产玉米中硒的赋存形态、分布及含硒大分子的提取分离技术。
Study the combined forms and distribution of selenium, the extraction and separation technology of macromolecule containing selenium in corn of Shuanghe of Enshi city.
以脂肪醇为原料，合成了双辛基季铵溴盐，其产率达80%。
Using fatty alcohol as starting material, double octyl quaternary ammonium bromide was obtained. It's yield reached 80%.
采用取样测数法和合并测产法分别对中双4号、华杂6号甘篮型油菜产量进行了测定。
The methods of sampling estimation data and amalgamating yield estimation were introduced to estimate theory yield of zhongshuang 4 and Huaza 6 of Brassica napus L. in this paper .
双载体固定化细胞经30批次连续重复发酵产酶稳定在较高水平，固定化细胞粒子机械强度高。
In the repeated batch culture experiment, the immobilized cells maintained a high capacity and machinery strength after 30 batches.
目的：探讨双胎儿童的产次、出生体重与脑瘫发病率之间的关系。
Objective: To explore the relations between cerebral palsy and the parity, birth weight in twins.
用该氧化树脂氧化双溴代物可得到良好产率的单醛；
The oxidizing resin had the property of oxidizing primary alkyl iodides, alkyl bromides, allylc and benzylic halides to aldehydes and excellent yields were obtained.
经一年来生产试验证明产量增加明显，与同马力双船拖网相比，平均单船网产增加40 ~ 45%。
Compared with pair trawling, it increases the single net production for 40 to 45 per cent and lowers the cost and decreases the Labour intensity. It improves the economic efficiency.
以小鼠粪便中的双歧杆菌、乳酸杆菌、肠杆菌和产气荚膜梭菌数量及肠系膜淋巴结、脾脏细菌移位为检测指标。
Intestinal flora including Bifidobacteria, Lactobacilli, Enterobacteriaceae and Clostridium perfringens in the feces and bacterial translocation in mesenteric lymph nodes and spleens were detected.
2PGL高强力双齿辊破碎机投入运行以来，不仅满足了洗选工艺对粒度的要求，也提高了精煤产率，创造了较高的经济效益。
Using ZPGL high-strength double toothed roll breaker not only satisfied with size demand for washing processing, but also improve cleaning coal rate and creates higher economy benefit.
2PGL高强力双齿辊破碎机投入运行以来，不仅满足了洗选工艺对粒度的要求，也提高了精煤产率，创造了较高的经济效益。
Using ZPGL high-strength double toothed roll breaker not only satisfied with size demand for washing processing, but also improve cleaning coal rate and creates higher economy benefit.
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