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The most famous rough algebras are Rough Double Stone Algebra, Rough Nelson Algebra and Approximation Space Algebra, and their corresponding general algebra structures are regular double Stone algebra, semi-simple Nelson algebra and pre-rough algebra respectively.

其中最有影响的粗代数分别是粗双Stone代数、粗Nelson代数和近似空间代数，它们对应的一般代数结构分别是正则双Stone代数、半简单Nelson代数和预粗代数。

By studying double-power integral, the geometric invariants and geometric probability can studied from the perspective. In particular, more complicated geometric probability can be resolved with the double-power integral inequality.

通过对双弦幂积分的研究，可以从新的角度更进一步的研究几何不变量和凸几何，特别是双弦幂不等式能解决更为复杂的几何概率问题。

There is proboscidean view of the past down to the "double as" For wings and fly "goshawk" simple and honest naughty "Panda", recline the mountain,"Tigers", revealed the fierce look,"Lei" angry "Buffalo "," Moon rhinoceros "," double-grass off the sheep,"" Lions Zhenhai "landscape.

近观则有长鼻垂地的"双象"、振翅欲飞的"苍鹰"、憨厚顽皮的"熊猫"、横卧山涧的"猛虎"、凶相毕露的"鲤鱼"、怒火冲天"野牛"、"望月犀牛"、"双羊奔草"、"镇海雄狮"等景观。

For non-ferrous metallurgy, building materials, chemicals, transportation, environmental protection and other departments to provide the four-rope grab, grab double rope, single-rope grab, electric hydraulic grab, timber grab, double-jaw grab, the more jaw-grasp Doo, shear-grab, rake-Grab, welcomed by the majority of users.

为有色冶金、建材、化工、交通、环保等部门提供的四绳抓斗，双绳抓斗，单绳抓斗，电动液压抓斗，木材抓斗，双颚板抓斗，多颚板抓斗，剪式抓斗，耙集式抓斗，深受广大用户欢迎。

Objective: To describe a new technique for arthroscopic double tibial tunnel anterior cruciate ligament anatomical reconstruction using double-looped semitendinosis and gracilis tendon autograft.

目的：介绍在关节镜下应用自体双股半腔和股薄肌腱经双胫骨隧道解剖重建膝前交叉韧带的手术方法及术后随访结果。

DongGuan WingOn Adhesive-Product Factory produces the PE protection film , BOPP protection film , PET heat protects film and Polyimide Film , PET , insulate the paper reunite the tape, Mala Adhesive Tape, the industry double- side tape, thin film beginning double- stick tape and oil water gum glues an oxygen resin AB gum.

东莞市永安胶粘制品厂生产PE保护膜、BOPP保护膜、PET高温保护膜、压纹保护膜、聚酰亚胺胶带，聚酯薄膜，绝缘纸复合胶带，玛拉胶带，工业双面胶，薄膜开关双面胶及油性水性胶粘剂、环氧树脂AB胶。

The authors performed 3D photographic measurement on the technical moves of ZHANG Wen-xiu as an excellent female hammer thrower in China to get relatively comprehensive body movement data by using two JVC3000 high-speed cameras, screened and analyzed the data by using SPSS software, and revealed the following findings: in terms of such technical parameters as spinning time, spinning track and spinning speed, there were some problems with this player, which restricted the enhancement of her performance, such as the double leg supporting time was shorter than the single leg supporting time; the angle of inclination of the track of various swirls (espe-cially the first swirl) was somewhat too big; the accelerating process was too short; too much attention was paid to acceleration at the single leg supporting stage; the spinning at the double leg supporting stage was too fast; the sus-tainable accelerating power was not high.

摘 要：采用两台JVC3000高速摄像机对中国女子链球优秀运动员张文秀的技术动作进行三维摄影测量，获得较为全面的人体运动学数据；运用SPSS软件对数据进行筛选和相关分析，发现该运动员在旋转时间、轨迹和速度等技术参数方面存在着一些制约成绩提高的问题，诸如双支撑时间短于单支撑时间、各圈(尤其第1圈)的轨迹倾角偏大、加速过程太短、单支撑阶段过于强调加速及双支撑阶段旋转过快、持续加速能力不强等。

the authors performed 3d photographic measurement on the technical moves of zhang wen-xiu as an excellent female hammer thrower in china to get relatively comprehensive body movement data by using two jvc3000 high-speed cameras, screened and analyzed the data by using spss software, and revealed the following findings: in terms of such technical parameters as spinning time, spinning track and spinning speed, there were some problems with this player, which restricted the enhancement of her performance, such as the double leg supporting time was shorter than the single leg supporting time; the angle of inclination of the track of various swirls was somewhat too big; the accelerating process was too short; too much attention was paid to acceleration at the single leg supporting stage; the spinning at the double leg supporting stage was too fast; the sustainable accelerating power was not high.

运动生物力学在乒乓球运动中的应用与。。。对投掷运动员运动损伤的调查分析与预。。。《运动防病治病讲座》健身运动的基本。。。都市运动研究：理论传统的界定和中国。。。《运动防病治病讲座》中年人的健身运。。。体校学生特征性运动自信心和运动动机。。。中国优秀沙滩排球运动员运动损伤流行。。。摘要：采用两台jvc3000高速摄像机对中国女子链球优秀运动员张文秀的技术动作进行三维摄影测量，获得较为全面的人体运动学数据；运用spss软件对数据进行筛选和相关分析，发现该运动员在旋转时间、轨迹和速度等技术参数方面存在着一些制约成绩提高的问题，诸如双支撑时间短于单支撑时间、各圈(尤其第1圈)的轨迹倾角偏大、加速过程太短、单支撑阶段过于强调加速及双支撑阶段旋转过快、持续加速能力不强等。

The experiments of series thermal analysis point out that this kind of plasticizer is beneficial to the thermal decomposition of double base composite propellant and hexogen, and its application in the modified double base propellants could improve combustion properties.

介绍了一种新型含能的叠氮类增塑剂PDADN 合成、结构及物理化学性质，系列热分析实验表明，它有利于双基组分及黑索今的热分解，指出它在改性双基推进剂中将可改善燃烧性能。

A pair of primers that contained flanking hydropathic amino acid codons were synthesized, to amply the sequence coding for 10~34 aa in the precursor sequence. The amplified fragment was inserted into pRSET-A to generate the first double repeat of the precursor gene. By utilizing a pair of isocaudamer BamH I and Bgl II sites, and another downstream Hind III site of plasmid pRSET-A, following a series of simple double digestions and ligation of the resulted products, a series of repeat (3, 4 and 6) precursor peptide fragment genes were derived.

本实验设计一对两侧含编码疏水性氨基酸密码子的引物，经过扩增前导序列10~34aa基因序列，并重新克隆入质粒pRSET-A构建串联二聚体后，再利用质粒pRSET-A的BamH I / Bgl II同尾酶克隆位点，经一系列简单的酶切和连接，快速构建这一前导肽中不含组氨酸标签序列的串联多聚体基因，并成功表达其六聚体重组蛋白。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。