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MAIN OUTCOME MEASURES: Changes in physiological and biochemical indicators before and after the competition.

主要观察指标：比赛前后生理指标和生化指标的变化。

The main problem with plastic -- besides there being so much of it -- is that it doesn't biodegrade .

塑料的主要问题——除了数量太多之外——是它不可生物降解。

The main research contents of bioengineering, history and development.

了解生物工程研究的内容，发展历史和发展方向。

It is one of the largest production bases of mobile communications in China, and the global production base of host computer and its supporting parts, as well as the production base and research center of medical industries, with biogenetic engineering, natural drug and preparation as its main projects, still it is the largest production base of baverage in Zhejiang.

是中国最大的移动通信生产基地之一，主机及相关配套企业，笔记本电脑的全球生产基地；生物基因工程、天然药物及制剂、医疗器械为重点的医药工业生产基地和研发中心；是浙江省最大的饮料生产基地。

Ecosystem element balance has been a main focus of global change ecology and biogeochemical cycle research.

生态系统元素平衡是当前全球变化生态学和生物地球化学循环的研究热点和焦点。

The long-range transportof aerosols,i.e.the biogeochemical cycle has been one of the major sources andone of the main characteristics of air-pollution in China.

气溶胶的长途传输，即元素或有关化合物的生物地球化学循环成为我国大气气溶胶的来源和形成机制的主要特点。

S a main source and sink of nitrogen from lake wetland ecosystem, lake sediment has an important significance for biogeochemical cycle of nitrogen.

bstract 湖泊底泥作为湖泊湿地生态系统中氮素的主要源与汇，对氮素的生物地球化学循环具有重要意义。

The essentiality and main research contents for the systematic studies on genuine traditional Chinese medicines by application of elements and technology of biogeochemistry were also discussed.

并对应用生物地球化学的理论和技术进行中药道地性系统研究的重要性及其主要研究内容进行了探讨。

Siemens Biograph PET/CT is a combined positron emission tomography and computed tomography system,and combined PET/CT systems are taking place of single PET to be the main choice of clinical application.

Biograph 系列扫描仪是西门子公司研制的高性能 PET 和螺旋 CT 一体化的混合 PET/CT 扫描系统，PET/CT 混合成像系统正在取代单独 PET 系统成为临床应用的主要选择。

The main topic with which both dealt was the biological and cultural diversity of mankind.

二者所处理的主要议题都是人类的生物和文化多样性。

A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。