圆形

First, if the nucleotide consists of a unit having circular symmetry about an axis parallel to the helix axis, the whole diffraction pattern is modified by the form factor of the nucleotide.

首先，如果核苷酸组成一个单位有一个圆形对称轴平行的螺旋轴，整个衍射图样是修改了外形的核苷酸。

Under the electron microscope, the virus was circular, icosahedral symmetry and had the non-pouch membrane.

用磷钨酸负染电镜观察，病毒呈圆形、无囊膜，且呈二十面体对称。

By the analysis of stress distortion of circular load symmetry flat plate, starting from the entire deriving course of thickness calculation formula, derives the simple formula of calculating blind flange thickness, which is fit for oral calculation of hydrostatic pressure testing of in-situ equipment and pipeline.

通过对对称载荷圆形平板的应力变形进行分析，从其厚度计算公式的整个推导过程入手，归纳整理出适合于施工现场设备及管道等试压时，所需的盲板厚度的简易计算公式，使其达到现场口算化。

And then to find a new straw hat, his right hand thumb and index finger pulling half a belly the size of a small finger swelling on the skin surface, in a twist on Mao Yan, can be a Cuochu Bohou symmetry, hollow circular, the pattern of the belt outside Ma Son to eat.

然后再找来一顶新草帽，右手的拇指和食指揪半个小手指头肚大小一疙瘩面，在帽沿上一搓，便可搓出一粒薄厚匀称，圆形中空，外皮带花纹的麻食子来。

This kind of shape's bimetal piece has overcome circular tinsel high and low transformation temperature difference big shortcoming

这种形状的双金属片克服了圆形金属片上下转变温度差大的缺点

It can be seen from chart 3 that the sinusoidal signal with given frequency will be transformed to the circular pattern after DFT transformation.

从图三可以看出，额定频率的正弦信号经过变换后呈现正圆形。

It can be seen from chart 3 that the sinusoidal signal with given frequency will be transfered to the circular pattern after DFT transformation.

从图三可以看出，额定频率的正弦信号经过变换后呈现正圆形。

A new circular rod leaky wave antenna with multi-layer dielectric gratings has been systematically and theoretically analyzed with the rigorous mode matching method to provide the gist and guidance for the design of the leaky wave antenna.

对多层圆形介质栅漏波天线进行系统的理论分析，为该天线的精确设计提供必要的依据和指导原则。

It is verified that a proper magnitude of linear to loop current ratio will results an omnidirectional circular polarized wave with same pattern for all transverse electromagnetic field in the far field but not in the near field or vise versa.

验证适当强度比例之线电流与环电流可在远场辐射四方均匀之圆形极向波，且所有横向电磁场之瞬间场形均相同，但在近场则否，或反之亦然。

There are three parts in our design: first, the dual-band branch line coupler provides two equal-power signals with 90° or -90° phase difference in each operating band. Second, the wideband switching circuit controls the two output powers of branch line coupler to excite the antenna structure for producing linear polarization wave or circular polarization wave. Third, the L-shaped fed conventional planar patch antenna is provided to overcome the coupling effect.

整体架构包含三个部分：L形电容耦合馈入式平面天线是为了克服平面式微带天线窄频的缺点；双频枝干耦合器提供天线在操作的两个频率点上各输出两组相差正九十度与负九十度的讯号，最后宽频的切换电路是将枝干耦合器的两组讯号作分配用以激发不同方向的天线以产生线性极化模态或同时激发两个垂直的天线以产生圆形极化模态。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。