查询词典 2-butene

Flower damask or white, 1, 3 armpit are born or the top is born, flower stalk is short; Form of calyx lobation line, fine and short; Corollaceous canister is long and thin, long 2, 2. 5 centimeters, split is wide form pouring egg, zun Xuan; Flower disc is composition of body of gland of 2 tongues shape, be born with carpel each other.

花淡红色或白色，1—3朵腋生或顶生，花柄短；萼裂片线形，细而短；花冠筒细长，长2—2.5厘米，裂片宽倒卵形，左旋；花盘为2枚舌状腺体组成，与心皮互生。

Ovary inferior, 2-loculed, with 2 erect ovules per locule; styles 2 or 3, connate at base.

雄蕊15-20。子房下位，2室，具2直立胚珠每室；花柱2或3，在基部合生。

Three concentrations (2.8%, 2.0%, 1.2%) of Ammoniacal Copper Quaternary was selected to treat Lodgepole pine wood for evaluating ACQ treatment on mechanical properties of blue-stained wood.

本文利用三种不同浓度ACQ防腐剂对扭叶松蓝变木材进行浸注处理，其浓度分别为1.2%、2.0%和2.8%。

The Tap with measures 2.2 x 4.2 x 0.5-inches and weighs 3.7 ounces is now available at T-Mobile for the price of $79.99 with a two-year service agreement after mail-in rebate.

该塔的措施2.2 × 4.2 × 0.5英寸，重3.7盎司现在可以在T -为79.99美元的价格Mobile的为期两年的服务协议后，邮件回扣。

The better technology has been obtained: taking water-EG as solvent 2-imidazolidinone was prepared. The molar ratio of the methanal (36%) to the formic acid (85%) is 1:2.8, reaction temperature is 95~100℃, reaction time is 16 h, taking cuprous chloride and triethylamine as catalyst, the molar ratio of the cuprous chloride and triethylamin to 2-imidazolidinone is 1.0% while 1,3-DMI was prepared.

较佳工艺条件为：制备2-咪唑啉酮时，以水－乙二醇混合作溶剂；制备1，3-DMI时，甲醛(36%)：甲酸(85%)摩尔比为1：2.8，反应温度95~100℃，反应时间16 h，氯化亚铜和三乙胺作催化剂，用量分别是2-咪唑啉酮摩尔数的1.0%。

Preparation of 2,6-dimethylnaphthalene(2,6-DMN) through transalkylation reaction of methylnaphthalene and 1,2,4,5-tetramethylbenzene is one of methods with excellent exploitation value and potentiality.

甲基萘和1，2，4，5-四甲苯转移烷基化合成2，6-二甲基萘(2，6-DMN)是最具研究价值和开发潜力的方法之一。

Alkylation of methylnaphthalene and methanol over HZSM-5 zeolite can make 2, 6-dimethylnaphthalene (2, 6-DMN) and the product stream contains isomers of 2, 6-DMN and unreacted MN, which requires efficient separation.

以甲基萘和甲醇为原料，采用HZSM-5烷基化催化剂制取2，6-二甲基萘(2，6-DMN)。由于产物中含有2，6-DMN的异构体以及未反应的MN，需对反应产物进行有效分离。

We consider Grassmann manifold G(2,8) as a submanifold of the unit sphere of /\2 which is the exterior vector space on Rn. Thus we have the induced metric and connection on G(2, n).

把Grassmann流形G（2，n）看作等距地嵌入在欧氏空间R~n上2-外向量空间∧~2中的单位球面上的子流形，得到它上面的度量和联络。

The result indicates that Chang 6^2 is a delta-lacustrine depositional system, and the principal producing pay is in subaqueous distributary channel where deposit fine sandstones and have good physical properties. The areas in the center of subaqueous distributary channel get high oil-produce while the flanks gel lower oil-produce relatively. The distribution of oil layer is mainly controlled by lithology, and Chang 6^2 is lithologic reservoir developed in the monocline setting which clime to the northwest.

研究表明：长6^2储层为三角洲－湖泊沉积体系，主要产油层位于长6(上标 2-2)的水下分流河道中，沉积细砂岩且物性较好，河道中心地区的产油量相对较高，而河道侧翼地区的产油量相时较低：长6^2中的油层分布主要受岩性控制，是在北西倾料的单料背景上发育的岩性油藏。

There are significantly differences on H_2O_2 levels between embryos in vivo and cultured in vitro on the early 2-cell stage and late 2-cell stage, but there are no significantly differences among embryos those on the 4-cell stage, morula and blastula using SPSS statistics software.

我们测量的结果是体内2-细胞早期、2-细胞晚期、4-细胞期、桑椹胚、囊胚胚胎的EB荧光密度分别是52.92，50.77，48.84，39.96和30.36；体外2-细胞早期、2-细胞晚期、4-细胞期、桑椹胚、囊胚胚胎的EB荧光密度分别是74.85，82.62，82.98，81.28和54.09。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。