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Each unitis of different biotic characters and displays different features of seawater composition during the time. 2 The black unit including a biotic extinction was caused by oceanic anoxic event. Crisis that deepwater keeled foraminifera encountered represents a ferocious anoxia in deep marine environment . Biotic recovery in gray unit reflects gradually improved marine circumstance. What the biotic extinction at the C/T boundary in black unit reflects an environmental mutation, whereas the gradual biotic change characterize the recovery of marine dissolved oxygen environment in a stepwise process. The red unit is the result of oxic deposition and characterized by extremely abundance of foraminiferal faunas, which reflects a high-oxidized marine circumstance. 3 As the most ordinary biotic index in paleoceanography researches, foraminifera represent anexcellent environmental indicator in this paper.

三套岩层表现出不同的生物特征，并指示出当时海水的不同性质。2黑层段是大洋缺氧造成的结果，生物大量灭绝，深层水具旋脊有孔虫的所遭受的危机反映出当时海洋深层水体严重缺氧的特征；灰层段中生物的恢复反映出海洋环境自缺氧事件之后的逐步改善过程，与黑层段反映的C/T 界线处生物绝灭反映的环境突变不同，灰层段生物特征的渐变指示出当时海洋溶解氧环境的恢复也是一个逐步的过程；红层段属于富氧沉积的产物，特征是有孔虫生物的极度繁盛，反映的是一种高氧化性的海洋环境。3有孔虫作为古海洋研究中最常用的生物指标，在本文研究中显示了良好的环境指示性。

Using finite element method, this paper investigates the influences of two deformed symmetrical double ridged,, waveguides on their transmission characteristics.

文章采用有限元法研究了圆形和椭圆形两种变形对称双脊波导对传输特性的影响。

A new travelling light modulator using single ridged waveguide as microwave circuit is designed.

设计了一种采用单脊波导作为微波电路的新型行波光调制器。

Several digital ridgelet transforms are compared in this paper.

本文著重比较脊波变换的几种不同数字实现及对於小波的改进。

On the basis of analyzing the characteristics of infrared imaging, a method for infrared image enhance based on mutilscale ridgelet transforms is given.

在研究红外图像特性的基础上，提出了一种基于多尺度脊波变换的红外图像增强方法。

Several digital ridgelet transforms are compared in this paper.

本文着重比较脊波变换的几种不同数字实现及对于小波的改进。

Secondly, a improvement of image denoising algorithm based Ridgelet tra...

其次，针对图像去噪中常用阈值方法的缺点和不足，提出了一种基于脊波变换的改进的图像去噪算法，该算法采用指数型阈值函数，利用SureShrink自适应阈值。

Based on the property of Ridgelet sparse representation to line singularities, a blind digital image watermarking algorithm is proposed.

利用脊波变换对直线状奇异特征的稀疏表示特性，提出了一种盲数字图像水印算法。

Found on sand ridges and coastal dunes in every Florida county, Serenoa repens is frequently used as an herbal remedy for incontinence, impotence, and enlarged prostate, among other maladies.

在佛罗里达的每个镇可以发现沙脊和海岸沙丘，Serenoa 是常被用作一种补救性的尿失禁，阳痿，前列腺增大，其中的病变的草药。

It is an ideal operation for applying ilium autografting with vertebral canal posterior wall plastic operation combining pedicle screw fixation to treat burst fracture of thoracolumbar vertebra with spinal stenosis, it is a simple and safe operative technique to entirely decompress in duramater and nerve roots and enlarge bore of vertebral canal therefore eliminating secondary spinal stenosis, the reconstructing of posterior column including spinous process and supraspinal ligament also increasing spinal stability.

自体髂骨移植椎管成形加椎弓根螺钉内固定，对严重胸腰椎爆裂性骨折伴椎管狭窄是一种较理想的手术方法。此方法操作简单、安全，解除神经及硬膜囊压迫的同时扩大了椎管，杜绝了继发性椎管狭窄，重建了后柱结构包括棘突及脊上韧带，增加了脊柱稳定性，值得推广。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷