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An enumerable object is typically an instance of a compiler-generated enumerable class that encapsulates the code in the iterator block and implements the enumerable interfaces, but other methods of implementation are possible.

典型的可枚举对象是由编译器自动生成的封装了迭代器块中的代码并实现了可枚举接口的可枚举类的实例，但其他的实现也是允许的。

Conduct investigation to identify animals and flea species that are implicated in the plague enzootic cycle in the region and develop a programme on environmental management to limit its potential spread.

开展调查以查明在该地区鼠疫的地方性动物病周期中涉及的动物和蚤类物种并制定一项环境管理规划以限制其潜在传播。

The study of triazole derivatives targeted IGPD is mainly reviewed, the enzymology and catalytic mechanism are also described in this paper.

文中介绍了IGPD的酶学特征与催化机理，并着重概述了以IGPD为靶标的三唑磷酸酯类抑制剂的研究进展。

In face of contemporary society and the complex and changing film art, epical films no longer pursue only outward features but broad and profound inner meanings, to reveal the human spirit and historical significance of wars and great events by using vivid metaphors and symbolic tensions. We say such epical films are undergoing an introversal development.

面对当代社会乃至电影艺术复杂多变的格局，有些被公认为具有史诗性的电影作品并非追求外在的史诗特征，而是追求内在意义的博大精深，并借助于形象的隐喻和象征的巨大张力，以求揭示某些重大历史事件所蕴涵的人类精神和历史意义，我们将这类影片视为"史诗性"的内向化的发展。

Thus the author established a unified theorem of the shaping of tooth flank, which can be applied to both Free-form and traditional cradle machine tools, unified the theories of both circular-arc and extended epicycloid bevel gears.

为此，作者建立了齿面成形的统一理论，它适合于Free-form型和传统摇台类两种机床类型，并将弧齿锥齿轮和延伸外摆线锥齿轮统一在了一起。

The efficient first asymmetric syntheses of-6β-hydroxy-7αH-eudesm-4-en-3-one, and its C-6 epimer were achieved starting from-dihydrocarvone, whichprovide a novel and efficient synthetic method to 6-oxgenated eudesmanes.

以-二氢香芹酮为原料，经五步反应，首次完成了6β-羟基-4(5)-烯-3-羰基桉烷及其6位差向异构体的立体选择合成，并为C-6位含氧官能团取代桉烷类化合物的合成提供了一种简便有效的方法。

Furthermore, we analyze and explain the growth phenomenon of individuals' code length in genetic inductive logic programming. On the basis of the research about equivalence class problem existing in first-order rule mining, we propose a fitness function based on information gain.

此外，我们还对自己提出的GILP算法运行中的个体编码生长现象进行了研究，并在对一阶规则挖掘中的等价类问题的研究基础上，提出了基于信息赢取的适应度函数。

On the aspect of functional testing, this paper represents the concept of functional testing and focuses on the functional test suite design. Based on the in-depth study of GSM-R network E-interface services and considering the completeness and redundancy of the test suite, equivalence class method is used to design the test suite, and then an analysis of its inadequate is conducted and a new design method is proposed .The two methods are compared and a suggestion on how to design a GSM-R network interoperability test suite is given.

功能性测试方面，本文阐述了功能性测试的概念，重点研究了功能性测试集的设计方法；在深入研究分析GSM-R网络E接口业务的基础上，分别考虑了测试集的完备性和冗余性，首先使用等价类划分方法设计了E接口的测试集，然后对其不足进行了分析，并提出了一种新的设计方法，最后对两种设计方法进行了对比分析，对如何设计GSM-R网络互联互通测试集提出了建议。

In this paper, we obtain some equivalent characterizations of a perfect paracompact space under the condition T1 regular. By using the one of them, an equivalent proposition on the countable product is proved.

本文在T1正则的条件下得到了完全仿紧空间的一些等价刻画，并利用所得到的刻画证明了这类空间的一个可数乘积定理。

Compared with classical cytotoxic T lymphocytes , NK cells are superior in the following aspects: NK cells are among the first cell types to be activated after intracellular pathogen stimuli, the activity of NK cells peaked between 1 to 3 days, retained during the first 7-10 days, and the T cells response emerged only after 7 days when the NK cell responses begin to decline; though comprising of only 10％-15％ of peripheral lymphocytes, NK cells mobilize most of the cell populations in a strong and high level response to different invasions, and act as key factors at early defense before a specific immune response could mount, while only certain clones were involved in T cell response; NK cells kill virus-infected or malignant transformed cells without pre-sensitization and without restriction by major histocompatibility antigen, which is usually a mechanism of immune escape to T cell recognition by virus-infected or tumor cells, thus NK cell in complementary with T cells play crucial roles in tumor and virus eradication.

NK细胞以其强大的细胞毒活性为特征，与细胞毒性T细胞相比，NK细胞具有如下特点：NK细胞虽然只占外周血淋巴细胞的10-15％，但是对刺激性因素产生应答的过程十分迅速，一次可以调动大多数细胞共同参与，而不是几个克隆的活化，免疫应答的强度高；病毒感染或恶性转化细胞的一个主要特征是细胞表达的MHCⅠ类分子下降或消失，并借助这一机制逃避特异性T细胞应答的识别，NK细胞介导的杀伤活性无需抗原刺激，不受MHCⅠ分子表达的限制，从而与T细胞应答互为补充发挥免疫防御的功能；NK细胞的免疫活性可以被多种细胞因子上调，其中IFNα，IL-2，IL-12，IL-15和IL-18具备更强的作用；NK细胞具有强大的细胞因子分泌功能，对于启动T细胞特异性应答必不可少。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。