圆形

Tests with diphenylamine,formaldehyde,and staining with acridine orange as well as the curves of thermal denaturation showed that this strain of virus had a single-stranded DNA.

电镜下经甲酰胺法展层的病毒核酸呈单链线状，分子量平均为2.1×106道尔顿。53s中空的圆形子粒，有很强的血凝性，而对照组铁蛋白和同一条件下所制备正常兔肝成份无凝血特性，说明53s的9nm粒子应为病毒外壳蛋白子粒。

It was a new mousegene in GenBank and named as SRG-L(spermatogenesis related gene expressed in the latestages of spermatogenic cells). The sequence of this cDNA has been deposited in GenBankwith the Accession No. AY352586. 2. Analyses of expression characteristics of SRG-L during mouse spermatogenesis.The results of RT-PCR and Northern Blotting indicated that no expression signal of thisgene could be observed in primitive type A spermatogonia and type B spermatogonia. Asignal first appeared in diplotene/pachytene spermatocytes, and was significantlyintensified in round spermatids and elongating spermatids, findly went down to beundetectable in mature spermatozoa.

RT-PCR和Northern Blotting分析表明：该基因在早期A型和B型精原细胞中不表达，从双线期初级精母细胞阶段开始表达并逐渐上调，在粗线期初级精母细胞、圆形精子细胞及长形精子细胞中均检测到高水平的mRNA，但在成熟精子中消失，具有明显的阶段特异性表达特征，并且组织特异性表达分析显示该基因在睾丸组织中的呈高表达。

And the thesis is divided into 4 parts.In the first part, the development of technology on Adjustable Speed AC Dirve is introduced. And the theory of DTC is analyzed. Besides the two classic DTC strategy, the hexagon flux track and approximate circle flux track controlling system, the thesis introduces some DTC strategies modified and some new controlling arithmetics.

论文共分为四个部分：第一部分介绍了交流调速技术的发展，分析了异步电机直接转矩控制的基本原理，除六边形磁链和近似圆形磁链两种经典的DTC控制之外，还介绍了改进型DTC及其他新型的控制算法。

A perfect circle does not have a discernable beginning or end -- therefore, it doesn't have a weak point where you can break it.

一个完美的圆形没有一个有迹可寻的开始或结束-因此，没有一个薄弱点，您可以打破它。

So a certain energy dissipator needs to design in the transportation from pipe flow to open channel flow.

对水头高，流量小的管道水流消能，圆形深筒式消力井是较理想的消能建筑物。

Inverse Distance Weighted method is sensitive to the distance and circle distributions are found around sampling point. IDW is an accurate interpolation method in case of the field information diffused from some center points.

距离反比法插值对距离比较敏感，出现很多以采样点为中心的圆形分布，在以点为中心呈扩散状分布的农田信息，采用距离反比法具有较好的插值效果。

They wanted to be able to distil the problem down to a few general, provable rules that avoid exact calculations, and that work every time for any circular pizza.

他们希望能够把这一问题的实质归纳成几条普遍的、可证明的定理，以避免精确的计算，并希望只要是圆形的披萨，这些定理都适用。

Stems branched from base, glabrous; branches divaricate; leaves lanceolate or oblong, base cuneate or narrowly cuneate.

茎分枝自基部，无毛；分枝极叉开；叶披针形的或长圆形，基部楔形或者狭楔形。

Culms erect, tufted, usually less than 100 cm; panicle narrowly oblong to ovate, 3–25 cm, branches and pedicels not divaricate

秆直立，丛生，通常少于100厘米；圆锥花序狭长圆形到卵形，3-25厘米，分枝和不极叉开 14

Divot A piece of turf removed with by the club when making a shot. It is always replaced and tamped down.

D- 球表面的凹面：高尔夫球表面经科学设计的圆形凹处，能使球进行正确稳定的飞行。

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。