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Also set operations to find the union, intersect, difference set and inclusion relations can be carried out.

然而至今还没有一种理想的方法用来在计算机内表示集合及其完成集合的一系列操作[1]。

Methods The investigation included 70 consecutive patients(74 eyes) with rhegmatogenous retinal detachment undergoing scleral buckling surgery.Seventy cases were randomly divided into 2 groups,group A 34 cases(36 eyes)with the needle drainage procedure and group B 36 cases(38 eyes) with the diode probe respectively.

孔源性视网膜脱离需行巩膜扣带术的病例70例74只眼，随机分为两组，A组34例36只眼采用冷针穿刺脉络膜放液，B组36例38只眼采用半导体激光眼内激光探头光凝脉络膜放液，比较两种方法的效果及并发症发生情况。

In wireless ad-hoc networks, routing based on connected dominating set is a promised approach, where the searching space for route is reduced to nodes in the dominating set.

在ad-hoc网络中，基于最小连通支配集(minimum connected dominating Set-MCDS)的路由方法是一种有效的分层路由方法，它将路由搜索主要集中在连通支配集内。

Mean activity coefficients of 12 electrolytes in their aqueoue solutions have been calculated over a wide range of concentration by use of the mean sphere approximation considering the hard-sphere contribution in the calculation proce- dure.

本文应用 MSA 方法，对0～2m 浓度范围内的12种电解质在水溶液中的平均活度系数进行了理论计算，计算结果与文献值吻合得很好。

The effects of endophyte infection on the activities of SOD, POD and CAT, as well as on MDA contents in Lolium perenne under drought stress and osmotic stress were studied.

比较了两种不同的水分胁迫方式(田间干旱胁迫和温室渗透胁迫)下，内生真菌感染对黑麦草叶内SOD、POD和CAT活性以及MDA含量变化的影响。

S eth: You were born with a built-in recognition of your own goodness.

赛斯：你生来就有一种内建的对自己善良的认知。

RESULTS We successfully obtained human caspase-3 gene, the genes and expression vectors of reversed caspase-3 and its fusion protein with part of the translocation domain of Pseudomonas exotoxin A. Compared with the control group, the expression of both genes caused in a similar degree the decrease of living cell numbers and massive occurrence of apoptosis.

结果成功获得了caspase-3基因，构建了重构型caspase-3基因和重构型caspase-3与绿脓杆菌外毒素转膜结构域部分肽段的融合蛋白基因及其表达载体，与对照组相比，在转染后1～4 d内，两种基因的表达均导致HeLa细胞存活数减少，大量细胞发生凋亡，且二者活性相当。

Exposure Meter, Reflectance: A meter calibrated to read the amount of light, within a more restricted area, reflecting from the surface of a subject or an overall scene.

曝光表，反射式：一种校准的测量仪器，用于对有限范围内，从物体表面或全部场景反射出的光量进行读数。

International factoring is a unique package of financial services and it has been developing rapidly in recent years.

作为一种综合性的金融服务，国际保理近年来在全球范围内得到了蓬勃、迅猛的发展。

Foreign exchange has become a global investment in the field of a new type of assets form.

外汇已经成为全球投资领域内的一种新型的资产形式。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐