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Endocrine hormones are important factors in maintaining pregnancy as well as initiation of parturition.

内分泌激素是维持妊娠和启动分娩的重要因素。

In corollary with the role of habitat patchiness in maintaining coexistence between competing species (see topic I1), environmental heterogeneity is likely to be of critical importance in allowing predators and prey to coexist.

由于生境斑块在维持竞争种间共存中所起的作用(见I1)推论，环境异质性很可能在允许捕食与猎物共存中具有关键的重要意义。

Maintaining the Open List: This is actually one of the most time consuming elements of the A* pathfinding function.

维护开放列表：实际上这是A*寻路函数最耗费时间的元素之一。

UN Peacekeeping Operations play an important role in maintaining international peace and security.

联合国维持和平行动是联合国维持国际和平与安全的一项重要手段。

If you work your chest and not your back, you will have a hard time maintaining good posture as your pectoral muscles overpower your back muscles and pull your shoulders forward.

如果你的工作不是你的胸部和背部，你将很难保持良好的姿势为您的胸肌压倒你的背部肌肉拉肩膀前入。

Its basical academic opinions include the following:no substantial distinction between offenders and common individuals,deterrence of penal punishment against crime,maintaining the death penalty,advocating pecuniary penalty,and adoption of plea agreement.

犯罪经济学的基本学术观点包括：犯罪人与普通人没有本质差别；刑罚威慑犯罪；保留死刑；提倡多用罚金刑；广泛采用辩诉交易。

The security and perdurability of bridge are directly related to people's life and wealth, therefore a predicting and warning and timely maintaining system based on identifying the modal parameters and inspecting damages of the bridge structures is developed which can help to eliminate hidden troubles and avoid the occurrences of catastrophic accidents.

模态试验是桥梁结构竣工试验、健康监测等方面的重要组成部分，而模态试验分析的最终目标是识别出系统的模态参数，为桥梁结构的振动特性分析、健康监测等提供依据，因此，桥梁结构的模态参数识别是模态分析的重要内容。

Based on the analysis of the requirements for process industry, development, implement, and maintaining of software system project are considered. The function and performance specification, which is the aid of software system designing, are shown.

1分析了流程工业实时数据库系统的需求背景，从项目开发、实施、维护、质量等角度考虑系统的非功能性需求，系统地分析了实时数据库系统应当具有的功能，并给出了性能指标的要求，明确了系统设计的目标。

The research results can be outlined as following:1. Based on the analysis of the requirements for process industry, development, implement, and maintaining of software system project are considered. The function and performance specification, which is the aid of software system designing, are shown.

本课题的研究结果和内容可概括为以下几个主要方面： 1 分析了流程工业实时数据库系统的需求背景，从项目开发、实施、维护、质量等角度考虑系统的非功能性需求，系统地分析了实时数据库系统应当具有的功能，并给出了性能指标的要求，明确了系统设计的目标。

Among the involving factors, neurotrophic factors in the microenvironment adjoining to perikaryon and neurites play crucial roles in maintaining survival, promoting orientional regrowth of axons and re-expression of functional phenotype of neurons.

近年来大量神经生物学研究表明：在影响损伤后神经修复或再生的诸多因素中，神经元胞体及轴突周围微环境产生的一些神经营养因子发挥着维持受损神经元生存、促进神经再生、恢复神经功能表型等重要作用。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。