环状的

The winglet type of vortex generators used in elliptic tube exhibit the best performances of area reduction rate at higher velocity applications.

矩形翼对波浪型涡漩产生器的热传性能较低於环状波浪型涡漩产生器，压降也较高，不过由於热传性能提升的幅度较压降增加率高，故面积缩率能随著流速的增加而提高。

A method to synthsis a - methylene - r - butyrolactones was reported by the substituted (a - carbethoxyvinyl) cuprate intermediates, generated by the addition of higer order cuprate to acetylenic ester,traping with epoxides stereoselectively.

本文报道了通过以高序铜代替低序铜对炔酸酯加成得到的取代铜与端基或环状环氧化合物的立体选择性反应，较高产率的合成α，β-取代烯酯，进而可合成α-亚烷基-γ-丁内酯类衍生物。

N-phenyl maleimide,1-Phenyl-1H-pyrrole-2,5-dione,N-phenylmaleic imide、Maleimidobenzene is abbreviated NPMI or N-PMI,pale-yellow aciform crystals.The melting point is 88～92℃.NPMI is a kind of heat resisting organic monomer,and can increase material thermostability by raising intemal rotation resistance of macromolecular,using its special molecular struture.

N-苯基马来酰亚胺俗称&单马&，英文名称为；N-phenyl maleimide、1-Phenyl-1H-pyrrole-2，5-dione、N-phenylmaleic imide、Maleimidobenzene，英文缩写NPMI，淡黄色片状晶体，熔点为88～92℃，是近年发展起来的一种耐热有机单体，由于它具有五元环状平面结构，嵌入高分子链中可增加链的内旋阻力，从而提高材料的耐热性。

In addition to the multi-ring alkenyl ethers and alpha-fluorinated acrylates, additional monomers comprising one or more cyclic aliphatic and heterocyclic compounds, both unsubstituted and substituted, in particular dihydropyrans, may be incorporated into the photosensitive polymers.

除了多环烯基醚和α-氟化丙烯酸酯之外，可向所述光敏聚合物引入另外的单体，所述单体包括一种或多种未取代的和取代的环状脂肪族化合物和杂环化合物，特别是二氢吡喃。

Remnant stubbles, branch marks and annulate marks were important morphological features to help determine the times of quasi-dichotomous branching.

茎的残茬、枝痕和根颈上的环状痕是辅助判断根颈分枝回数的重要形态特征。

Initially, the approach involved a simple ring closure, but this technique failed because the deeper aponeurotic tissues could not be approximated without tension in the repair. The plug-and-patch technique also failed to match the results of its open counterpart.

最早的术式为单纯环状缝合闭合术，但是存在深腱膜组织有一定张力的缺点；其次是堵塞和贴补术式，同样由于缺乏与开放式手术的竞争能力而宣告失败。

Other moths in the families Noctuidae and Arctiidae have developed membranes that sense bats' echolocation and enable them to take evasive action, flying in a loop or dropping quickly out of the bat's flight path when they detect its presence.

夜蛾科和灯蛾科中其他种类的蛾子身体上长出了隔膜，可以感知蝙蝠发出的定位声，从而可以采取逃避行动。当发觉蝙蝠出现时，这些蛾子便作环状飞行，或者快速下降，逃出蝙蝠的飞行路线。

Optimum Design of the Armillary Reinforced Ring s of External Pressure Vessels Based on MATLAB

性质：为增强容器的刚性和稳定性而固定于容器的内侧或外侧的环状构件称为加强圈。

Among the other worlds orbiting Bespin's star are Miser, Orin and the Velser's Ring asteroid belt.

其他围绕贝斯平的恒星旋转的星球是米瑟、奥林和维尔瑟的环状小行星带。

Annular pancreas is a rare congenital abnormality resulting from a fusion anomaly of the bilobed ventral pancreatic bud, with the dorsal bud and associated duodenal migration.

环状胰腺是一种罕见的先天异常，其病因是由于两个分裂的腹胰芽融合异常所致，而背侧的腹胰芽伴随十二指肠转位。

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％。