查询词典 dl

While the kinds of instruction offered in these programs will differ, DL usually signifies a course in which the instructions post syllabi, reading assignments , and schedules on Websites , and students send in their assignments by e-mail .

虽然这些程序中提供的各种指令的不同，分升的过程，通常标志着在该指令后教学大纲，阅读作业，并在网站时间表，并通过电子邮件发送的学生在他们的任务电子邮件。

Alkylation reactions of thiophenic compounds with olefin contained in FCC naphtha on USY zeolite catalyst were investigated.

以USY分子筛催化FCC汽油中噻吩类硫化物与烯烃的烷基化反应，采用DL-2B-EE微库仑仪测定反应前后硫分布的变化，考察了USY分子筛的制备条件和烷基化反应温度对其催化性能的影响。

Genomic DNA of positive transformed plants; 6, 7: Genomic DNA of negative transformed plants; 9: genomic DNA of untransformed plants; 10: Positive control of 3G1MHpCAMBIA2301; 11: NTC; 12: DL 2000 marker.

2.2 转基因拟南芥的筛选选择培育后获得转基因拟南芥植株。从其叶片中提取微量DNA， PCR鉴定，可扩增出750 bp左右片段（图3），表明3G1MHpCAMBIA2301基因已整合到拟南芥染色体中。

Firstly i felt Damian Lewis' performance to be a complete distraction and to be frank i hated him for it. He over-acted and seemed so forced that all i could focus on in parts was his bright red veiny neck fit to burst with tension.

首先我认为DL的表演完全是哗众取宠，坦率的说我讨厌他，他表演得太过火了，导致我只能把目光集中与他发怒时闪亮的、红色的、青筋暴绽的脖子。

The main flavoring compositions with higher relative content were benzeneethanol, 3-hexen-1-ol, 1,3-butanediol, methionol, ethyl hydrogen succinate, ethyl lactate,γ-Butyrolactone, diethyl dl-malate, acet.

利用溶剂萃取提取刺梨干酒香气成分，经GC/MS分析，应用色谱峰面积归一法测定各成分的相对含量共检出36个峰，鉴定出31种香气化合物，占总含量的97.58%。

It is found that the solubility of dl-p-HPGS is very small in pure acetone and in the solvent with low water content.

在纯丙酮和低含水量的混合溶剂中，对羟基苯甘氨酸硫酸盐溶解度很低。

Mr Hu repeated China's position that it was ready to meet the Dalai Lama, but only if he met certain pre-conditions, such as desisting from trying to "split the motherland","incite violence" and "ruin the Beijing Olympics".

胡书记强调中国的立场愿意会见DL，但是前提是终止试图&分裂祖国&，&煽动暴力&和&破坏北京奥运&。

PCL can agglutinate many kinds of erythrocyte. The hemagglutinating activity of PCL on rabbit red blood cells was speelbeally inhibited by a few glycoprotein, but was not inhibited by all mono-, dl, oligo-and polysaecharides that have been tected.

PCL能凝集各种动物来源的红细胞，凝集兔红细胞的作用不能被已测试的单糖、双糖、和聚糖所抑制，仅被少数几种糖蛋白抑制。

Methods 162 cases of intra-articular fractures were treated with PDLLA expanding absorbable screws and plaster splinting for 3~4 months.

采用超高分子聚－DL-乳酸自膨胀可吸收螺钉治疗关节内骨折162例，术后石膏托固定3~4周。

D-Pantothenyl alcohol, also called ortho-vitamin 85, is an important nutrition suppled substance. It has been widely applied in the field such as medicine, cosmetic, foodstuff, feed additive, and so on. The preparation of D-pantothenyl alcohol and the optimization of key factor are discussed mainly in this paper. It mainly includes three section.In the first section, with formaldehyde, isobutyl aldehyde and diethyl oxalate as the starting materials, D-pantolactone is prepared via three steps including condensation, catalytic hydrogenation and physical resolution. The specific rotatory power of the product is consistent with imported product.

D-泛醇，俗称原维生素B_5，属维生素B旋类营养增补剂，广泛应用于医药、化妆品、食品、饲料等领域，本文着重探讨了其制备及关键因素的优化，主要内容可分三部分：第一是D-泛内酯的制备，先以甲醛、异丁醛和草酸二乙酯为起始原料合成酮基泛内酯，再经催化氢化得到DL-泛内酯，然后通过物理拆分获得D-泛内酯，得到产物的比旋光度与进口产品基本一致。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。