成双的

This is why we feel Beijing has become the perfect place to celebrate the 798 Biennial festival on an international scale.

这就是为什么我们认为若要将798双年展办成一届具有国际规模的盛会，北京是最为理想的场所。

The design of digital notch filters can be achieved through three steps:firstly,the design of analog lowpass filter; secondly,it is analog lowpass to analog band stop filter conversion;at last,using the bilinear transformation make the analog notch filters change into digital notch filters.

研究一种在Matlab语言环境下设计IIR数字陷波滤波器的方法，在数字陷波滤波器设计过程中，先进行模拟低通滤波器的设计，然后进行模拟低通/模拟带阻滤波器转换，最后采用双线性变化法将模拟陷波滤波器转化成数字陷波滤波器。

Biphenyl polyimides derived from asymmetric bis s have good solubilities and film formation.

6由不对称双氯单体合成的联苯型聚酰亚胺具有良好的溶解性和成膜性。

HDI's molecular structure is a special saturated straight chain and it has highly unsaturated double bonds.It has such very lively and chemical properties that can be used to form polyurea with water. And it also reacts with polyurethane to form polyol, reacts with amine to biuret.

己二异氰酸酯分子具有特殊的直链饱和结构和含有高度不饱和双键的异氰酸酯基团，化学性质非常活泼，能够与水生成聚二脲，与多元醇反应生成聚胺酯，与胺反应生成缩二脲。

Methods:9 patients including 8 male and 1 female were included in this study.2 patients suffered from both side of ANFH,5 were righe side and 2 were left side.X-ray,CT and MRI were performed before the surgery.4 hips were classified as ARCO stage 1,7 hips were stage 2.All the patients were treated as follows:the area of NFH and cystis degeneration were detected and bouche decompression was done through X-ray with C-arm,and the necrotic bone was cleared for the pathologic diagnosis under the monitoring of arthroscopy.And then the non-cell based tissue engineering bone, which was the complex of autologous red bone marrow and osteoinductice absorbing material containing BMP,was transplanted into the body.

本组9例，男性8例，女性1例；双侧股骨头坏死2例，右单侧股骨头坏死5例，左单侧股骨头坏死2例；术前均行X线摄片、CT、MRI 检查，ARCO分期：Ⅰ期4髋，Ⅱ期7髋；C型臂X线透视下行股骨头坏死区和囊性变区定位、髓芯减压，关节镜监视下，刮除坏死骨送病理；植入由自体红骨髓与含BMP的骨诱导活性材料复合成的非细胞型组织工程骨，并用空心钛钉支撑股骨头软骨下骨质。

This was one of the break- throughs in key agreement protocols.

此后双线性对成了构造基于身份密码系统以及各种数字签名方案的重要工具，也成为了密码学界的研究热点之一。

They may be wet, even a bit briny, and it might be hard to find a matching pair, but you won't find Nike Inc.

见过这样的耐克运动鞋吗？也许是湿的，可能还有点咸，而且要凑成一双还有点困难。

The basic experimental system of gas combustion characteristics was set up in the research, which is composed of Bunsen burner (pre-mixed burner), gas supply system, high accuracy flux control system, mixing system and measurement system of flame characteristics.

双气头多联产系统中用于发电的是化工过程中的弛放气和剩余粗煤气（主要可燃成分为CH4、CO、H2）。

Cremocarp A dry fruit splitting into two one-seeded portions.

双悬果：是由两个心皮的子房发育而成的干果。

The used feet were shredded to prevent a black market in stolen hobbit feet but apparently Dominic Monaghan kept a pair.

用过的脚都被撕成碎片，以防黑市拿去重复利用，而多米尼克·莫纳汉自己保留了一双。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！