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The canopy structure and leaf morphological characters of 4 sugarcane genotypes at different leaf layers on seedling were studied by using CI-100 plant canopy instrument and CI-203 area meter instrument. The results showed the leaf morphological parameters, canopy structure and radiation transmission at different leaf layers were notably different among different genotypes. The variation of Ila, Amfi, Dl at different leaf layers were mainly caused by the leaf width at relevant position. The variation of K at different leaf layers was related to Amfi and Dl. The variation of Td（transm. coef. for diffuse penetration）had significant correlations with Ila, Amfi and Dl. The variation of Tr（transm. coef. for radiation penetration）had significant correlations with Dl, leaf width and the ratio of leaf length to width. The variation of Par had significant correlations with Ila, leaf area, leaf width and the ratio of leaf length to width.

摘要利用CI-100数字植物冠层分析仪和CI-203叶面积分析仪测定了4个甘蔗品种不同叶位层的冠层参数和相应叶位叶片的形态特征，结果表明：不同基因型不同叶位层间叶片形态、冠层空间结构和冠层辐射特征存在显著差异，不同叶位层叶面积指数、叶簇倾角和叶分布的变化主要由冠层内不同叶位叶片叶宽的变化引起，而不同叶位层消光系数的变化主要与叶簇倾角和叶分布有关；散射光透过系数的变化主要与叶面积指数、叶簇倾角和叶分布有关，直射光透过系数的变化主要与叶分布、叶宽、长宽比有关，光合有效辐射的变化与叶面积指数、叶面积、叶宽、长宽比有关。

It's just a question of time before China will be a luxury-car market on a par with the U.S.,' says Jochen Goller, vice president of marketing for BMW in China.

宝马中国营销副总裁高乐说，中国成为与美国匹敌的豪华车市场只是一个时间问题。

The square-on-square grids set diagonally of half MERO joint have been analysed and compared according to a design example and more than thirty projects already constructed. The conclusion is that the steel con- sumption for the square-on-square grid with a span of 30 metres or so is most economical; the size and height of grid are the important par- ameters which affect the steel consumption to a high degree.

本文根据设计实例和已建的三十多个半螺栓球节点斜放四角锥网架，进行内力和技术经济分析比较得知：30米左右跨度的斜放四角锥网架用钢量最省；网格大小及网架高度等参数对用钢量有较大的影响；设置赘杆能较好地调整杆件内力，降低造价。

Beijing environmental problems hold severe, and atmospheric and water pollute, soil and water loss, hot island and yawp are leading problems,and take on territorial characteristic. Based on research on relativity between urban forest and these environmental problems, urban forest can effective improve environmental quality in Beijing. And for the aim of improve environmental quality, Beijing forest overlay should attain 35% at least in citywide range, and local-areas being severe environmental problem should be provided with higher forest overlay.5. Through the study on urban forest needed capacity, Beijing's forest coverage is up to par in citywide range, but montanic forest coverage, plain covered with trees and average forest area are lacking, and CO2 and O2 balance is incapable;form the point of heat and balance CO2 and O2 balance,urban forest the city zone and suburb is lack. There is urban forest developmental potential space,but the city zone and suburb area need be compensated form urban forest in circumjacent region.6. On the based of the above results and ecological network system, the author drived whole region into city area, plain and mountain area are needed at the point of planning thoughts of running-through forests and water .

根据城市森林与北京市主要环境问题的相关性分析，城市森林在改善这些环境问题中具有重要的作用，为有效改善这些环境问题，整个北京市域范围内森林覆盖率至少达到35%，并且分布比较均匀，环境问题严重的局部区域需要不同程度增加森林覆盖率。5、通过对北京市城市森林需求量研究发现，虽然在市域范围内北京森林覆盖率达到了国家标准，但是山区森林覆盖率、平原林木覆盖率、城区人均森林面积不足；从区域热平衡和碳氧平衡角度分析，城区和郊区不能满足本区域的城市森林需求量，虽然北京市城市森林具有一定的发展潜力，整体上基本可以满足城市需要，但是这些区域需要依靠周边区域城市森林的补偿。6、根据以上的研究结果，以中国森林生态网络体系建设的点、线、面布局理念为指导，以&林网化——水网化&作为优化理念，将北京市整个市域划分为城区近郊区及其辐射区域，平原区和山区三大区域，依据三大区域特点进行城市森林布局优化。

"Short Party" means, in relation to a Cont ract other than an option, the par ty that has notionally sold t he

&空头方&，在用于期权以外的交易时，指名义上已经卖出相关基础产品的一方

E xpand intra-Party dem ocracy and f ocus on enhancing t he Par ty's solid arity an d unity.

要以扩大党内民主带动人民民主，以增进党内和谐促进社会和谐。

Osmanthus, will truly have the whole fall, and will be flowers and a par of.

桂花，将整个秋天真正的拥有了，将繁花一片比下去了。

PAR(photosynthetically active radiation) is an important ecological factor which controls the energy transforming and matter production.

光合有效辐射是影响生态系统能量转化和物质生产的重要生态因子，对其时空格局的研究，有助于深入理解生态系统的生理生态因子变化和光合行为。

Problems with Daily Photosynthetically Available Radiation product of Sea-viewing Wide Field-of-view Sensor are pointed out in this thesis, and two methods are used to improve the accuracy of the PAR product.

本文指出了SeaWiFS传感器日平均光合有效辐射数据产品存在的问题，尝试了两类方法对其进行改进。

For biogenic VOC modeling, emission factors, vegetation biomass and leaf area index were determined for 37 vegetation types. The widely accepted algorithm of Guenther et al.(1993), describing the relationship between light, temperature and the VOC emissions, was adopted. A new canopy model was established to simulate photosynthetically active radiation and leaf temperature within the canopy.

对于VOC生态源模式，确定了37种植被的VOC排放因子、生物量和叶面积指数；采用了相对成熟的关于VOC排放强度和光合有效辐射、叶面温度的依赖关系；建立了一个新的植被冠层模式以模拟冠层内PAR和叶面温度的变化。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。