两管的

After the onset of meiosis reinitiation, the GV stated to migrate along microtubules to the animal pole and attached to the site beneath oocyte membrane, that followed by GVBD.

通过激光共聚焦显微镜观察，未成熟的卵母细胞中存在5种类型的微管，并且有两个微管组织中心锚定在卵母细胞突起下方。

The shaft comprises a cylindrical array of nine doublet microtubules surrounding a central core of two single microtubules.

主体的杆状物是由九组二联体微管围成的圆柱体腔，中心为两个独立微管。

Based on the analysis of the fluid flow in the downcomer of an airlift internal loop bioreactor , a turbulent two-fluid model for airlift internal loop was proposed.

在对气升式内环流生物反应器内部流动分析基础上，全面考虑反应器下降管中气泡的并聚破碎、气液两相间相互作用和滑移等，建立了能描述反应器下降管中复杂流动的CFD数学模型。

OBJECTIVE: To compare the sealing capability between the standard gutta-percha point and Thermafil warm gutta-percha.

目的：比较临床常规使用的标准牙胶尖和Thermafil热牙胶两种根管充填材料的根管封闭性能。

The methods of chip-breaking in machining pipe thread were researched deeply, which are classified into two categories: the methods acting on tools and adding auxiliary devices for chip-breaking. The principle of work, the technical characteristics, the advantages and disadvantages, and so on were analyzed, compared and summarized, and the following research directions were also pointed out.

摘 要：深入研究了管螺纹加工的断屑方法，将目前管螺纹加工的断屑方法分为两大类——作用于刀具上的方法和增加断屑辅助装置的方法，并对各种方法的工作原理、技术特点及优缺点等进行了全面的分析、比较和总结，指出了管螺纹加工断屑方法仍然存在的问题和下一步的研究方向。

Large air separation plant 40000m3/h, This plant adopts molecular sieve system to adsorb CO2, C2H2, moisture and CnHm in air to pre-purify air, by use of air booster compressor, to pressurize some of purified feed air by two sections, pressurized air to warm up high pressure liquid oxygen in high pressure coil heat exchanger to ambient temperature and delivere out off cold box to coal gasification, some pressurizrd air by first section is drawn from middle part of coil heat exchanger and expanded in medium pressure expander then led into lower column, other part of pressurized air by second section is drawn from cold end of coil heat exchanger and led into lower column after throttling, un-pressurized feed air is cooled by return gas in plate fin heat exchanger and led into lower column.

产品描述：采用常温分子筛空气预净化系统吸附空气中的CO2、C2H2、水份和一些碳氢化合物，使用单独的空气增压压缩机将部分净化后的原料空气分为两段增压，增压后的空气在高压绕管式换热器中将经液氧泵加压的高压液氧汽化并复热至常温送出冷箱直接供煤气化工序使用，第一段增压后的空气，部分从绕管式换热器中部抽出经电机制动的中压透平膨胀机膨胀后送入下塔，另一部分经第二段增压后从绕管换热器的冷端抽出节流后送入下塔，未经增压的原料空气在板翅式换热器中被低压返流气体冷却后进入下塔。

An isthmus is a narrow, ribbon-shaped, communication between two root canals that contains pulp or pupally derived tissue.

根管峡部是指同一牙根内两根管之间含有牙髓或牙髓生成组织的一种窄形、带状结构。

Tubular bells hang at one shelf different metal pipe of length, compass have one - 1/2 8 degrees and two 8 degrees, arrange with chromatic scale, beat the clock and in charge of carrying and bringing in sounding with the musical instrument mallet at the time of play.

管钟是将不同长度的金属管下吊在一个架子上，音域有一又二分之一个八度和两个八度，以半音阶排列，演奏时用琴槌敲击钟管顶端来发出声音。

Objective To observe the crosssectional anatomy of mandibular second molars with two different root kinds and measure the thickness of the minimum root canal wall.

目的：观察并测量两种不同牙根形态的下颌第二磨牙根管横断面最小根管壁厚度。

The detailed simulation and comparison of the heat shield has been carried out for the spiral cooling method and the flexible cooling method.

模拟比较了液氮冷屏在采用螺旋管和蛇形管两种冷却方式情况下屏上温度分布，为冷屏冷却管线布置的选择提供理论依据。

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％。