可交换的

Not every subgroup of a D-group is also a D-group. If a subgroup is a D-group we call the subgroup "sub- D -group." The "commutator ideal" of G is the smallest sub-D-group containing its commutator subgroup. We found that the commutator ideal can be viewed as a finitely generated module over a ring when G is a finitely generated metabelian D-group.

并非每个子群都是一个可除群，若一个子群是可除群，我们称之为子可除群(sub-D-group)，而G 的交换子理想则是在G中包含其导出群的最小子可除群，我们发现当G是一个有限生成亚交换可除群时，其交换子理想是一个有限生成模。

This paper addresses high speed communication solution between 16 bit microcontroller?based data acquisition system and PC/AT compatible computer. After 16 bit Industry Standard Architecture peripheral interface of PC is analysed, a 16 bit parallel communication card is developed with three kinds of optional modes: poll, interrupt and DMA.

为了解决单片机数据采集系统与PC机之间大数据量交换时的低速问题，剖析了目前广为流行的PC／AT兼容机ISA通道的16位I／O接口原理，并通过细致的电路设计，开发了一种通用性很强的高速16位并行通讯插卡，且使用了3种可选的通讯方式，即查询、中断和DMA。

Based on the complexity of the sources for the sediments in the Okinawa Trough, the sequential extraction procedure was applied to the hydrothermal influenced sediments in the core H9 recovered from the middle Okinawa Trough. Five fractions, including exchangeable, bound to carbonates, bound to iron and manganese oxides, bound to organic matter, and residual were acquired. Based on detailed analysis for major, minor and rare earth element compositions, the distributions of the elements in various speciations of the sediments were determined and the controlling mechanism was discussed. The variations of hydrothermal signatures in the core, partitioned from the terrigenous, volcanic and biogenic materials, have been demonstrated and the accumulation rates of some elements were evaluated.

本文针对冲绳海槽多种物源沉积作用混杂的特征，采用顺序淋滤萃取方法对海槽中部受热液活动影响的H9岩芯沉积物进行了分离，将沉积物中分为可交换态、碳酸盐结合态、铁锰氧化物结合态、有机结合态和残渣态五个部分，并对各个结合态中常量、微量和稀土元素组成进行了分析，确定了不同元素在不同结合态中分配的比例，分析了控制不同元素进入沉积物的主要机制。

Therefore, to build a complete, efficient, and enlargeable eDoc exchange system is worth researching.

因此，如何构建一个功能较为全面的、高效的、可扩展的电子公文交换系统是当前需要研究的问题。

Collections made during the Japanese colonial period in Taiwan (1895–1945) are of special interest in that they mark the first attempt at a truly comprehensive botanical inventory of the island. Unfortunately, these early collections are not widely distributed and are often in poor condition in Taiwanese herbaria.

然而，此段时期之植物标本并未广泛的交换至世界各地，现多於台湾及日本的标本，而且早期由於缺乏好空调控温装置，台湾潮湿炎热的亚热带气候条件并於标本的保存，许多珍贵的史标本常因此受到可回的破坏。

The catalytic activity of the mono- and bi-nuclear complexes, and unsymetric complex 〓〓 MeNTB =tris ( N-methylbenzimidazol-2-ylmethyl amine and tetranuclear complex 〓L = N, N, N', N'-tetrakis (N-methylbenzimidazol-2-ylmethyl-1,4-diaminobutane for oxidation of hexane was examined. Thedi-iron complexes with one exchangeable monodentate ligand and unsym-metric(μ-carboxylato) diiron complex exhibit high catalytic ac-tivity, while mononuclear Fe complex are inactive.

这些单核、双核化合物、不对称化合物〓-三氨和四核化合物〓四-1，4-丁二胺催化氧化环己烷的催化活性被测试，结果表明含有可交换配体氧桥联双核Fe化合物和不对称双核Fe化合物表现很高的催化活性，而单核的Fe化合物是非催化活性的。

By using the definition of equidiffrential,a sufficient condition of commutating order in connection with the limit and derivation of a sequence of diffrential function is obtained.

利用等度可导的概念代替较强的函数列的导函数是一致收敛的条件，得到了极限运算与求导运算可以交换的一个充分条件。

A subgroup of a finite group G is called π-quasinormal in G if it permutes with every Sylow subgroup of G. A subgroup H of a group G is said to be c-supplemented in G if there exists a subgroup N of G such that G=HN and H∩N≤H=Core.

有限群G的一个子群称为在G中是π-拟正规的若它与G的每一个Sylow-子群是交换的。G的一个子群H称为在G中是c-可补的若存在G的子群N使得G=HN且H∩N≤H＝Core。

The immobilizing effects of red mud by bayer process is much better than by sintering process under different concentration of application, because of the smaller particle size, larger surface area, higher content of Fe2O3 and Al2O3.The adsorption capacity of red mud and zeolite to Cd was very large.

通过钝化剂对溶液中Cd离子的吸附解吸试验表明：赤泥、沸石对Cd离子具有很大的吸附容量和较强的吸附亲和力；只有不到25%的吸附镉为水溶态和可交换态，而绝大部分吸附的镉(50%以上)为与赤泥结合稳定的、不易为生物利用的形态。

Thus, in use for reference of other countries'successfullegislative experience of procedure and combining our country current legalenvironment, It is absolutely necessary to establish our evidence exchange system. Although the "Some Provision of the Supreme People's Court on Evidence inCivil Procedures"(hereafter as "Evidence Rules") Dec.

2001年12月21日颁布的《最高人民法院关于民事诉讼证据的若干规定》，对我国民事审前证据交换作出了一些具体层面上的规定，改善了我国民事审判中有关问题长期无章可循的状况，在一定程度上提高了诉讼效率。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失