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In this paper,we discuss the extension of the Dω-order and D*ω-order in partiany or-dered group,obtain the necessary and sufficient condition for an extension of the partial-or-der in partially ordered group to Dω-order and D*ω-order, and the condition for the exten-sion of every partial order in a group to Dω-order.

讨论了偏序群的Dω－序扩展，得到了偏序群的偏序可扩展成为Dω－序的充要条件，以及每一偏序均可扩展成为Dω－序的条件，同时刻划了Dω－序群。

Strict requirements are necessary in order to register these horses.

严格要求是必要的，以便注册这些马匹。

In order to research parts relation network of product family deeply, it is necessary to detect simple paths in parts relation network.

为进一步深入研究零部件关系网络，需要搜索零部件关系网络中的简单路径。

In order to research parts relation network of product family deeply,it is necessary to detect simple path s in parts relation network.

为进一步深入研究零部件关系网络，需要搜索零部件关系网络中的简单路径。

In order to study further this type of time series, it is necessary to extract deterministic and stochastic components.

为了进一步研究这种类型的时间系列，有必要提取确定性和随机成分。

The nose bleeding patients should strengthen the nursing the mentality after stopping the bleeding. It is necessary to take in oxygen persistently, to stop infection by observing the condition of disease carefully, and to strengthen the nursing of lying in bed and the nursing of mouth ,eyes,ordure and diet.

鼻出血患者在止血的同时应加强心理护理，必要时持续低流量吸氧，进行细致的病情观察，防止感染，加强卧位护理、口腔护理、眼部护理、排便护理及饮食护理等可促进康复。

Water and organic materials are necessary for life as we know it.

水和有机物质是生命必要的，因为我们知道它。

This organization is necessary or natural, given the nature of the organism.

这个组织是必要的或自然的，因为大自然的有机体。

Secondly, we investigate C°-flows on orientable closed surfaces having POTP, and obtain a necessary and sufficient condition of such flows.

剖析了这些轨道的邻域的轨线结构，还考虑了经过Poisson稳定点及几乎周期点的横截圈和相应的回归映射，其中本文讨论了可定向闭曲面上具有伪轨跟踪性质的C〓-流，得到了可定向闭曲面上C〓-流具有伪轨跟踪性质的较为简洁的充分必要条件；最后本文借助于从可定向的闭曲面到不可定向闭曲面的复叠投射，讨论了不可定向闭曲面上的C〓-流与其提升的轨线之间的联系，解决了不可定向闭曲面上C〓-流具有伪轨跟踪性质的判定问题。

Ask students to read the text, and then verify the definition, changing their original definition when necessary.

让学生阅读课文，在语境中检验单词的含义是否正确。如果有必要，修改他们最初得出的单词含义。

" I' d like to get some rough idea about music in the baroque ear, please."

请简要介绍一下巴罗克时期的音乐，好吗？

The results showed that the peak latency and pattern of SEPs elicited by electrical needling in LI-l1 and MP were similar. The amplitude of SEPs elicited by electrical needling in LI-l1 was higher than that of MP. There was no obvious SEPs generation when MM was electrical needling.

结果显示，电针刺激曲池穴和其邻近桡侧伸腕长肌运动点诱发性脑电波的波形和波峰时间是类似的，只是穴位的诱发性脑电波波幅较大，而电针刺激非穴位点并没有明显的诱发性脑电位。