圆盘的

The following are the expressionsfor the mean pressure set up at the detection plate and for the time of the signal toprogagate from the radiator to the detector:这里是1个公式,省略） where Re is the real part of the expression appearing within the braces, 0 is the density ofthe medium, vo is the amplitude of the vibrational velocity, c is the speed of sound in themedium, d2 = I +(r/zcos 8, z is the distance between the emitting and receiving plates, B is the angle between the axis of the acoustic channel andthe axis of the tube, r = vro/c, v is the flow speed of the fluid, d is thediameter of the pipe, m is the circular frequency, k is the wave number,where a is the radius of the plate (this is taken as the same for the emitting and receivingplates for simplicity, but there is no difficulty in discussing plates differ~mg in radii),,~ is the vibrational frequency of the emitting plate, andThe triple sums in the expressions for N~ and N2 may be neglected if the flow speed islow, since the contributions for these become negligible.

以下是表达式平均压力为定于检测板和为信号时间progagate从散热器到探测器：（这里是1个公式，省略）假如再是出现在大括号表达式的实部，0是密度中期，沃是速度的振动幅度，C是健全的速度中，D2中=我+的导向8，z是对之间的距离发射与接收板，B是声之间的通道轴角该管的轴，R =中心内大多分为/荤，v是流体的流动速度，，D是管道直径，m是圆频率，k是波数，的其中一盘是半径（这是为重点，同样的发射与接收为le简单板，但没有讨论板的困难，在半径不同毫克），，是发光板振动频率，和在N的表达式的三重总结和N2可以忽略，如果流速低，因为这些变得微不足道的贡献。

I was now recover'd from my Surprize, and began to look round me, when I found the Cave was but very small, that is to say, it might be about twelve Foot over, but in no manner of Shape, either round or square, no Hands having ever been employ'd in making it, but those of meer Nature: I observ'd also, that there was a Place at the farther Side of it, that went in farther, but was so low, that it requir'd me to creep upon my Hands and Knees to go into it, and whither I went I knew not; so having no Candle, I gave it over for some Time; but resolv'd to come again the next Day, provided with Candles, and a Tinder-box, which I had made of the Lock of one of the Muskets, with some wild-fire in the Pan.

这时，我从惊恐中恢复过来，开始察看周围的情况。我发现洞不太大，周围不过十二英尺，但这完全是一个天然的洞穴，既不方，也不圆，不成什么形状，没有任何人工斧凿的痕迹。我又发现，在洞的尽头，还有一个更深的地方，但很低，只能俯下身子爬进去。至于这洞通向何处，我当然不得而知。当时我手头没有蜡烛，只好暂时不进去，但我决定第二天带上蜡烛和火绒盒进去。那火绒盒我是用一支短枪上的枪机做成的。另外，我还得带一盘火种。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。