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On the ecosystem health, definitions from utilization and ecosystem views are introduced, the contents and difficulties in assessing it are discussed. On the biodiversity enhancement, the relationship between forest structural complexity and forest biodiversity are discussed, the significance of old growth structure are highlighted, and measures of changing forest structure to promote forest biodiversity are put forward. On the landscape planning in forest management, some patterns, theoretical foundations and models are introduced, especially three conceptual models, i.e., key habitat\|corridors model, nature landscape model, and supportive features model. On the alternative silvicultural systems, reasons for developing alternative silvicultural system by mimic of nature disturbance are discussed, and some advanced techniques and their ecological basis are noted. Finally, on the ecosystem service, its contents and importance of assessment are illustrated.

关于森林生态系统健康，讨论了不同角度对生态系统健康的定义和不同层次上的生态系统健康的内容及评价生态系统健康的困难所在；②关于森林生物多样性，探讨了森林结构复杂性与生物多样性的关系，老龄林结构对森林生态系统的意义和作用，以及如何通过经营调整结构促进生物多样性；③关于森林经营的景观规划，描述了进行景观规划的途径、理论和模型，并对三种概念模型进行了介绍；④关于森林经营的替代技术体系，介绍了模拟自然干扰设计替代技术体系的原理，分析了替代经营技术体系产生的原因和有关最新技术研究进展；⑤关于森林生态系统服务，讨论了生态系统服务的基本内容和评价在森林生态系统管理中的重要意义。

In the previous study, we have found that ischemia/reperfusion could cause structural and functional damages to sinoatrial node cells in vivoand in vitro, leading to electrophysiological disturbance by affecting the regular rhythm and frequency.

本实验室在前期的研究中发现，缺血/再灌注可引起在体及离体窦房结细胞结构和功能的改变，影响其电信号发放的节律和频率，导致电生理活动的紊乱。

On the base of studying and analysing the reason of skidding disturbance to forest ecology in felling areas.

调查了伐区集材作业对森林中保留木、地表的破坏及对土壤的压实等情况。

Based on the shortcomings of the COD determination method revised in National Standard, some improvement measures of the standard method, including improvement of slaking phrases, research of substitution catalysts and elimination of chlorine ion disturbance, are compared and discussed. Afterwards, some common substitution COD determination methods, such as correlation coefficient analysis method, electrochemistry analysis method, spectrophotometric analysis method and flow inject analysis method, are introduced.

在论述了国标中COD标准方法不足之处的基础上，本文就标准方法的众多改进措施分类进行了比较与探讨，包括消解方法的改进、替代催化剂的研究以及氯离子干扰的消除，然后介绍了相关系数法、电化学法、分光光度法和流动注射法等COD测定替代技术。

Excessive fluoride results in disturbance of serum hormone levels, which is an important cause for spermatogenic cell apoptosis.

氟在一定剂量和作用时间内可致大鼠血清性激素水平紊乱，是导致生精细胞凋亡的重要原因之一。

Methods. Fifty-six patients with eidence of a sphincteric disturbance who underwenturgent surgery were identified and inited to follow-up.

由于腰椎间盘急性突出而导致括约肌功能障碍的需要急症手术的56例患者被邀请到本研究中来，对其进行了随访。

Stiff neck is also called stiffneck, which is a functional disturbance of the neck muscle because of the uncomfortable pillow. If it is not cured in time, it will become a chronic disease, not just influencing the life quality, but also becoming cervical spondylosis.

落枕又叫失枕，大多指因睡觉枕头不适造成的颈背部肌肉功能障碍，如不及时治疗，转为慢性疾病，不仅影响生活质量，也会发展为颈椎病。

Stiff neck is also called stiffneck, which is a functional disturbance of the neck muscle because of the uncomfortable pillow.

国内著名中医骨伤科专家，曾任英国伦敦康大诊所全科医生，获英国注册中医师资格。

Stiff neck is also called stiffneck, which is a functional disturbance of the neck muscle because of the uncomfortable pillow.

商品简介主讲：卢先国内著名中医骨伤科专家，曾任英国伦敦康大诊所全科医生，获英国注册中医师资格。

The author stressfully compare financial variables of possibly acting as intermediary goals: monetary supplies, market interest rate and inflation rate in terms of monetary multiplier, monetary circulating velocity, and basic money etc, which tries by comparing to that the index of monetary supplies is superior to the others in terms of measurability, controllability, and anti-disturbance.

其后在这一部分中本文结合经济与金融环境的变化，从货币乘数、货币流通速度、基础货币等几个方面，重点比较了货币供应量、市场利率和通货膨胀率等三个可供作为货币政策中介目标使用的金融变量，力图通过比较来说明，从可测性、可控性和抗干扰性等多个角度看，货币供应量优于另外两个指标。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。