查询词典 ball-point

We have presented a practical method for the preparation of propargylic alcohols from terminal alkynes and carbonyl compounds promoted by KOH in the presence of 18-crown-6,and subsequent efficient cyclizations of propargylic alcohols with 2-naphthol catalyzed by InCl_3·4H_2O under the solvent-free ball-milling conditions.Ball milling exhibits its superiority over the reported methods in the preparation of propargylic alcohols and naphthopyran derivatives.

采用机械研磨方法进行了连续的两步固相化学反应的研究：首先，在氢氧化钾和18-冠-6的作用下，端基炔和羰基化合物在机械研磨条件下反应可以高效地生成相应的炔醇化合物；其次，在四水合三氯化铟的催化作用下，生成的炔醇化合物和2-萘酚在机械研磨条件下环加成生成相应的萘并吡喃产物。

"Each ball bearing has three main parts: two grooved, ringlike races and a number of ball s."

球轴承有三个主要零件，即两个带有沟槽的套圈和许多球。

With equal authority Culin discusses ball games: racket, shinny, football, and hot ball.

以同样的权力簇林讨论球类：球拍，晶灵，足球，热球。

Rather than broadcast a two-dimensional picture of a ball, send a simulacra of the ball.

不是播放一个球的一张二维图片，而是发送这个球的一个拟像。

So I steal some ball-pens all of them I've given money back to them,100 RMB,the ball-pens were also stealed by other classmates including from me,the sales men in Liton black tea,Zhongbai supermarket gave more changes to me I all gave them back to them,20 RMB,the man who sells package rice gave me more food I've paid twice price of it,10 RMB,a female I mate on the train came here to see me I thought that my test results were bad now so I feel a little shame then I let her go lunch for free.

我在求学阶段从顶着黑锅，冰毒，海洛因，运动员兴奋剂，神经性药物，破坏视力毒剂，发烧损害智商毒剂，得神经病的药，张老头/孙婆婆为期8个多月闹醒睡觉，踢出寝室换成最差寝室等等偷来的笔我全部赔了100元钱，那些笔也被班上包括在内的很多其他人从我这偷走了，我在立顿红茶，中百超市售货员多找的20元钱我都归还了，打菜的那个人打了多一点的菜我交了两份钱10元，一个火车上遇见的女人来了我看见现在成绩不好不好意思请她吃饭没收钱，等等。

The spindles use superprecise,steel ball,ceramic ball bearings.

电机采用日本、德国、法国生产的超精密、钢珠、陶瓷球轴承，精度高，使用寿命长

The Triangle Offense is your friend : In essence, this means you will not hoard the ball; you will not mindlessly dribble out the shot clock before hoisting up an unconscionably awful fadeaway three with a defender draped all over you; you will swing the ball, make your cuts, and look for the open man.

三角进攻是你的朋友：在本质上，这指你并不对球掌握着贪婪的享有；你会有思维地运球、投篮在24秒之前，然后在三分线左右摆脱你的防守都；你会突然变向，切入，看着空位的人。

On the basis of the summarization of MCM-Cs main features and its assembly and packaging technologies, the paper puts stress on relatively deepgoing studies in practically advanced MCM-C assembly process technologies as gold ball wire bonding, IC chip gold ball stud bump making, IC flip chip bonding and underfilling, in high reliability MCM-C packaging process technologies as integral LTCC substrate packaging, hermetically metal sealing, and also in the basic technological process of MCM-C assembly and packaging. Later on, it presents the effectively engineering development of two high level actual module products--a high-density monolithic processor system MCM-C , a high-speed data collecting and processing system MCM-C. Lastly, it briefly introduces various common methods of quality inspection and reliability test of MCM-C assembly and packaging in engineering practice.

论文在综述MCM-C的主要特点及其组装封装技术的基础上，重点对金丝球引线键合、IC芯片金球凸点制作、IC芯片倒装焊与下填充等实用先进MCM-C组装工艺技术和LTCC基板与外壳及PGA引线的一体化封装、气密性金属封装等高可靠MCM-C封装工艺技术以及MCM-C组装封装基本工艺流程展开了较深入的研究，有效完成了高密度单片机系统MCM-C和高速数据采集控制系统MCM-C等两种高水平实际产品的工程化研制工作，扼要介绍了工程实践中MCM-C组装封装工艺常用的质量检验方法和可靠性试验方法。

Metering rooms in Daqing oilfield adopt microcom puter to meter and LQR-50 type gas meter and float ball joint control pipeline pump. In operation, oil en tering gas meter or float ball malfunction to make pump unstarting or ceaseless frequently.

大庆油田计量间采用微机控制计量，选用的LRQ-50型气表和浮球接点控制管道系在运行时，经常发性气表进油以及浮球失灵造成泵不启动或启不停等现象。

This "changes" the ball's direction, you're not volleying back where the ball came from, but it goes with the stroke's strength.

这样就是变线球，你没有将球截击回它过来的方向，但这个方向是你击球力量所在。

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。