查询词典 gaseous

Although there is 34,500 tons of gaseous nitrogen in the air column above each acre of the earth's surface, this cannot be used by plants until it has been fixed by nitrogen-fixing bacteria and algae.

虽然在地球表面每英亩空气柱中有34，500吨气态氮，但是如果这些气态氮不被固氮菌和藻类固定，是不能被植物利用的。

A flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals.

一种无色易燃的气态烯烃，从石油和天然气中提取，用于制造其他许多化学品。

A blue gaseous allotrope of oxygen, O3, formed naturally from diatomic oxygen by electric discharge or exposure to ultraviolet radiation.

臭氧：一种气态氧气的同素异形体，O3在紫外线辐射下通过电子放射或暴晒从双原子氧气自然形成。

It revealed that the gaseous oxygen was related to the deep oxidation of hydrocarbon, since the breakage of C-C bond in allylic intermediate didn＇t exist during the process of reaction. This is due to the weak ability of lattice oxygen to attack hydrocarbon molecular.

实验结果指出，烃类的深度氧化反应与气相氧的存在有关，晶格氧对烃分子中碳碳键的攻击较弱，反应中烯丙基中间体几乎不发生碳碳键的断裂。

These observations are lending strength to an alternative hypothesis: that the gaseous giants detected so far formed elsewhere and have since spiralled towards the stars they now orbit.

这些发现有力地支持了另一种假设：迄今所发现的气态巨星是在其他地方形成的，并且朝现行轨道绕行的恒星螺旋状前进。如果

It contains quadratic photosynthetic chamber and columned soil fixing body, wherein soil fixing body of canopy leaf chamber bottom set with knob basal portion being corrugation notch, capable of easy inserting amboceptor in soil to form inclosed canopy leaf chamber, amboceptor upper port inosculation with photosynthetic chamber lower wall round opening to make canopy leaf chamber intracavity forming one integral, photosynthetic chamber upper wall sealed by two side glue and photosynthetic film to ensure photosynthetic chamber steady light permeability, photosynthetic chamber sidewall installed one small size fan controlled by external battery and switch, fan capable of rapid making canopy leaf chamber gaseous reaching equalization.

本发明涉及一种用于测定植物冠层群体光合作用的冠层叶室，由正方形的光合室和圆柱状的土壤固定体两部分结合而成，冠层叶室下部土壤固定体设有把手，基部为波纹状切口，可以很容易地把固定体插入土壤中形成密闭的冠层叶室，固定体上口与光合室底壁的圆形开口吻合，使冠层叶室的内腔形成一个整体；光合室顶壁用双面胶和光合薄膜密封，以保证光合室稳定的透光性能；光合室侧壁内安装一个小型风扇，由装在侧壁外的电池和开关控制，风扇可使冠层叶室内的气体迅速达到平衡。

The previous research, in which macro-kinetics of ammoniation of phosphoric acid was measured in a double magnetic stirring reactor,found that the reaction between wet phosphoric acid and gaseous ammonia was a rapid reaction controlled by the gas-film mass transfer.

本文采用数学模型法，根据氨化反应过程的机理，通过小试建立数学模型并经合理简化，再通过中试对模型进行修正和完善，最后用工业大装置加以验证，使所得的模型可用于工业放大。

The invention relates to a gaseous diffusion layer for a polymer electrolyte membrane fuel battery and a preparation method thereof, relating to a gaseous diffusion layer for a fuel battery and a preparation method thereof.

用于聚合物电解质膜燃料电池的气体扩散层及其制备方法，它涉及一种用于燃料电池的气体扩散层及其制备方法。

The advantages of catalytic synthesis of oxalate ester in gaseous phase by carbon monoxide are summarized. The five important characterization of our patent technology invented for the use of industrial raw material and the potential good economic value of the process are presented. It indicates that study and development of catalytic synthesis of oxalate ester .oxalic acid as well as glycols by natural gas in gaseous phase have a great advantage for full utilization of natural gas....

概述了&CO气相催化合成草酸酯&技术的先进性，介绍用工业性原料为主要内容的专利技术：&气相催化合成草酸酯连续工艺&的五个主要特点及其潜在的经济效益，并指出，用天然气经合成气进行气相催化合成草酸酯和草酸、乙二醇的研究与开发，可使天然气得到充分的利用，具有很好的经济效益，是天然气化工综合利用的一条有效途经，也是当代C1化学的重要发展方向。

Based on the comparative experiment between the walls of the gaseous phase and the liquid phase,the analysis of the metallography organization and the scanning electric mirror as well as the energy spectrum,this thesis exactly evaluates the corrosive nature of monel metal in the low liquid phase and the top gaseous phase within the acid regeneration tower.

主要研究氢氟酸再生塔使用多年以后，根据气相和液相部位的壁厚对比试验，金相组织分析，扫描电镜分析以及能谱分析，评定了蒙乃尔合金在酸再生塔中低部液相部位和顶部气相部位的腐蚀性能。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。