在困难中

Then it made denoising and edge detection for the CT image of the brain aiming at the properties and keystoned of CT image. In the process of denosing for CT images of the brain,because it has some characteristics,such as the biomedical signal is a typical non-stationary signal with a strong noise in background,it is more difficult to resolution.

在对脑部CT图像的去噪处理过程中，本文针对生物医学信号是典型的非平稳信号，具有很强的背景噪声，处理起来较困难的特点，引入了一种基于EMD方法的脑部CT图像去噪方法，它可以有效地去除噪声的干扰，充分保留信号的局部特征。

But Lardy is not optimistic that with a difficult global environment China will allow a faster currency appreciation.

但是拉底不是一个乐观主义者，在一个困难的全球环境中，中国将容许一个更快的市价评估。

Balloon and McCoy laryngoscopies improved laryngoscopic/intubatingconditions relative to conventional laryngoscopy.

在中重度传统气道管理困难的病人中， McCoy 复合气囊喉镜检查进一步提高了喉镜检查暴露和插管的条件。

Because preoperative differentiation of the three hernia types involving the sigmoid mesocolon is often difficult, the diagnosis is confirmed only with surgical management in most cases.

由于术前鉴别这三种累及乙状结肠系膜的疝常常很困难，因此在绝大多数的病例中只有通过手术才能确诊。

This rule, equally arduous in actual and in intellectual life, mya serve for t he whole distinction between greatness and meanness

在现实生活和精神生活中都是同样艰巨困难的，它是伟大与低贱的整个区别

There is abrupt phase change in nonsinusoidal waves modulation. It can easily produce impulse current and bring large difficulty to high-power emission system; so it is not beneficial to holding the orthogonality between the orthogonal pulses and demodulating information.

非正弦波调制信号存在相位突变，在工程实践中易产生较大的冲击电流，给大功率发射系统带来较大困难；而且相位不连续也不利于保持正交脉冲间的正交性，不利于信息的正确解调。

Success in South Waziristan, which Pakistan only notionally administers, would look much more modest than that in Malakand .

取得在南瓦奇里斯坦的胜利只是巴基斯坦政府想象中的，这看起来比马拉坎战役更为困难。

In 2000, Nishida et al synthesized the PPDO whose molecular weight could reach 142,000 but the monomer conversion could only reach 79.4% by using stannous octoate as catalyst with co-initiator under conditions that T = 100oC, M/I = 4900, t = 20 h, in 2000, the enzymatic polymerization of PDO was carried out at 100oC for 15 hours using 5wt% immobilized lipase CA by Nishida et al.

这主要是因为PDO的结构相对稳定，开环聚合要比GA、LA、CL困难一些，而且用于PDO开环聚合的催化剂体系单一，主要集中在Ti， Zr， Sn， Ld， La， Yb， Hg等重金属，然而这些重金属作为副产物，不容易从PPDO中分离出来，阻碍了PPDO作为医用材料的应用，这也造成了PPDO的成本昂贵。

Analysis of the secondary structure of ITS1 in Pectinidae: implications for phylogenetic reconstruction and structural evolution It is at present difficult to accurately position gaps in sequence alignment and to determine substructural homology in structure alignment when reconstructing phylogenies based on highly divergent sequences.

4栉孔扇贝与扇贝科其它7种扇贝ITS1二级结构的系统进化与结构进化分析目前，在序列比对过程中对缺口进行精确定位十分困难。

In CO2 gas metal arc welding, the difficulty hi seam tracking by pendular arc sensor is how to attain the tolerance signal of weld joint.

在CO_2气体保护焊中，采用摆动电弧传感器进行焊缝跟踪的困难在于如何提取准确的焊缝偏差信号。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。