长角于

The divergence angle depends on the width of the aperture relative to the light wavelength.

发散角取决于小孔宽度相对于光波长的大小。

The study of spatial configuration and characteristics of pulsed-wire velocity probe shows that: the yaw-and pitch-response characteristics have a good behavior due to the asymmetrical arrangement of the prongs. Because the amplitude of sensor wire response signal changes with the flow velocity, the differentiated signal is selected to trigger a voltage comparator. The pulsing frequency is restricted to about 100Hz to allow the wire to cool between pulses. The first velocity probe with big acceptance cone has been developed in China, and the way of measuring the Reynolds normal and shear stress and application have been given in this dissertation.

对脉冲热线空间速度探针的空间结构及特性的分析表明：三根长支架平行且安置于同一平面的探针结构可以获得大的测量角和好的测量性能；由于传感丝的响应信号幅值随流速变化较大，故应采用微分法进行信号处理；对于5μm的传感丝由于散热时间基本不变，约为10ms，故脉冲发射的最高频率为100Hz；本文在国内首次研制成功了一种大测量窗的脉冲热线空间速度探针，并给出了测量雷诺应力的方法和实例。

Inflorescence spikelike, cylindrical, composed of spiny or bristly deciduous burrs arranged along an angular, often sinuous rachis; burrs sessile or with an obconical basal stipe, each composed of 1 or more sessile spikelets surrounded by an involucre of spines and bristles; bristles flexuous or more often spinous,± flattened, grooved on the outer face, united below, the degree of union varying from a small basal disk to a deep cupule, inner spines or bristles often ciliate around spikelets. Spikelets lanceolate, acute; glumes unequal, shorter than spikelet, lower sometimes suppressed; lower floret membranous, staminate or neuter; upper floret firmer, protogynous.

花序穗状，圆筒状，由落叶的毛刺沿着一具角安排的具刺的或具刚毛，通常波状的轴组成；毛刺无梗或具基部的倒锥状柄，每一个由1无梗或更多组成以总苞的刺和刚毛包围；或更多的刚毛曲折通常spinous，多少扁平，在外面上具凹槽，下面的合生，协会的度从一小的基部的花盘变化到一深的壳斗，小穗披针形，锐尖；不等长的颖片，短于小穗，降低有时压抑；更低的小花膜质，雄蕊花的或中性；坚定的上面小花，雌蕊先熟。

The garden, which was slightly arched, had in its centre, on the summit of a hillock, a fine pointed and conical fir-tree, whence ran, as from the peaked boss of a shield, four grand alleys, and, ranged by twos in between the branchings of these, eight small ones, so that, if the enclosure had been circular, the geometrical plan of the alleys would have resembled a cross superposed on a wheel.

小院的前面，有所谓小园。我们在这样一个整体中再加上一个天井，加上由内部各院房屋所形成的各种不同的弯角、监狱的围墙、一长列相距不远可以望见的沿着波隆梭街那一边的黑房顶，我们便能想象出四十五年前存在于小比克布斯的伯尔纳女修院的整个面貌了。

House all high thin, is actually fastidious about the black japan facade, hangs knocker which two handle iron hit, two meet the eave, rolls the trough eaves tile, the roof peak has the lime to outline, but two jiao fly up at angle slanting curl upwards, just like is the wing in the aquatic situation.

镇街在河的北岸，长虫的尻子，没深没浅地，长，且七折八折全乱了规矩。屋舍皆高瘦，却讲究黑漆门面，吊两柄铁打的门环，二道接檐，滚槽瓦当，脊顶耸起白灰勾勒而两角斜斜飞翘，俨然是翼于水上的形势。

The red-topped lighthouse on Makapu'u Point stands at the end of a long, fence-lined trail in the southeast corner of Hawaii's Oahu island.

在夏威夷瓦胡岛东南部，玛卡普吾角的红屋顶灯塔矗立于一条围满栅栏的长径末端。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。