形成边缘

As a result, if the iridescence is produced by thin-film interference, not only the thickness of lamellar structure must be defined within a certain nanometer, but also the refractive index need to be different between lamellar structure. In other words, the chemical composition, refractive index and thickness of exsolution lamellae need form to trinity, such as labradorite, albite, andradite and orthoamphibole. If the iridescent color is produced by grating-diffraction, the lamellar structure just needs to be arrayed regularly, the spacing of the edges of lamellar structure needs to be regular and narrow, but not necessarily within the range of the wavelength of visible light, such as shell of abalone, pearl and opal.

薄膜干涉式晕彩不仅要求宝石内部结构层的厚度必须在一定的纳米范围内，而且结构层内部的折射率也必须有所差别，也即，当结构层由两相组分出溶而成，其化学成分、折射率和结构层厚度形成三位一体时，符合薄膜干涉式晕彩，如拉长石、钠长石、石榴石和角闪石；而光栅式衍射晕彩则仅要求结构层排列规则，边缘狭窄但不需要窄到可见光波长范围内，能使入射光的振幅或位相，或两者同时产生周期性空间调制的结构即可，如鲍贝壳、珍珠和欧泊。

The wheels can be solid or comprised of a fixed stack of toothed disks, concentrically aligned, the teeth of each succeeding disk angularly offset in a common direction from the teeth of the next preceding disk to create a wheel having a plurality of uniform, elongated composite teeth around the circumference of the stack, the teeth being angled from the wheel's axis.

该轮可以是实心的或者由固定的堆叠的带齿盘片构成，它们共心地对齐，每个在后盘片的齿都与前一盘片的齿在角度上朝同一方向错开，以形成具有多个均匀、伸长的复合齿的轮，这些复合齿围绕堆叠盘片的边缘，并与轮的转轴成角度。

The glass is fitted and fixed to an annular step part having been formed in the edge member.

玻璃壳安装和固定在形成在边缘构件内的环形台阶部分上。

Result The cell of the fungi was oval and monopole budding. The fungi had deposition and zone in liquid medium, its colony was red with smooth and gray surface, regular edge and sticky texture in solid medium, and the fungi had no ascospore and could not produce pseudohypha. The fungi was negative through glucose ferment and it could assimilate potassium nitrate.

结果］该菌细胞卵形，单极芽殖；在液体培养基中有沉淀且有菌环；在固体培养基中，菌落红色，表面平滑、暗淡，边缘整齐，质地粘稠；无子囊孢子；无假菌丝形成。

The shrinkage effect interacts with the liquid wetting ability and the expansion effect induced by the mass flow, resulting in distinct bulgy structure in the cross-section of the film rim.

Marangoni流动引起的收缩效应与液体润湿性及流动压力的扩展效应相互作用，在液膜边缘形成了凸起区。

Base of vegetative stems forming a stout caudex; leaves and calyx lobes with white cartilaginous margin and midrib keel.

营养体茎的基部形成一粗壮块根；叶和萼裂片具白色的软骨质的边缘和中脉龙骨状。

Geochemical study shows that this kind of chert is characterized by lower SiO2 (～80%), highr Al2O3 (～10%) and lower V without significant negative Ce anomaly, which suggests that it formed in a continental-margin environment closely related to terrestrial material.

地球化学研究发现，该硅质岩具有较低的SiO2（80％左右）和较高的Al2O3（10％左右），微量元素中V的含量也较低，稀土元素中不出现明显的Ce负异常，表明其形成于与陆源物质关系密切的大陆边缘环境。

This occurs because movement di rections on shallowly dipping structures are related to graviational collapse of the thickened orogenic pile rather than push transmitted from the subducting pl ate to the overriding plate.

在斑状变晶边缘上形成的、近乎垂直的叶理在基质中的方位可能在较大范围内变动，因为它们会在稍早期间形成的叶理再活化作用影响下发生转动或遭到破坏。

The results show that the white thick-bedded siliceous rocks have high contents of SiO2 and Al2O3 and high ratios of Al/ and Al2O3/(Al2O3+ Fe2O3). The ∑REE are low, and the North American shale-normalized REE patterns are characterized by enrichment of LREE and absence of Eu and Ce anomalies, which suggest that the white thick-bedded siliceous rocks might have been formed in the continental margin environment and affected significantly by terrigenous constituents. The anatase-rich siliceous rocks have high contents of TiO2, Fe2O3, Cu and V but low Al/(Al + Fe+ Mn) and Al2O3/(Al2O3 + Fe2O3) ratios. The ΣREE are high, the North American shale-normalized REE patterns are obviously characterized by left-oblique to flat styles of curves and slight negative Ce anomalies, implying that they might have been formed in an oceanic ridge environment.

研究结果表明，呈厚层状产出的无矿白色硅质岩具较高的SiO2、Al2O3含量及Al/、Al2O3/(Al2O3+Fe2O3)比值，稀土元素总量很低，其北美页岩标准化配分模式为向右倾的曲线，无明显铈异常和铕异常，表明其形成于受陆源影响的大陆边缘构造环境；赋矿岩系中薄层状富钛硅质岩的TiO2、Fe2O3、Cu、V含量较高，但Al/、Al2O3/(Al2O3+Fe2O3)比值较低，稀土元素总量较高，北美页岩标准化曲线为明显左倾型－平坦型，具弱的负铈异常，表明其形成于洋脊及附近环境。

A kettle is a steep-sided, usually basin- or bowl-shaped hole or depression without surface drainage in glacial-drift deposits, often containing a lake or swamp, and believed to have formed by the melting of a large, detached block of stagnant ice (left behind by a retreating glacier) that had been wholly or partly buried in the glacial drift.

锅穴是指边缘陡峭的盆形或碗状孔洞或凹陷，在冰碛沉积物表面没有水系，通常包围着湖泊或沼泽。通常认为是冰川退缩过程中停滞于冰川沉积物中的巨大冰块融化而形成的，一般10-15米深，直径达30-150米。在加拿大平原地区有很多第四纪冰川退缩所形成的锅穴湖泊就用 kettle lake 表示。

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。