他把绳子打了环系在木头上。
含1，3，4-恶二唑环系的电致发光材料的研究进展。
Progress of Electroluminescent Materials Containing 1,3,4-Oxadiazole Rings.
讨论了卟吩环系的共轭体系和芳香性质，以及与化学反应活性的联系。
The relationship between conjugated system and chemical reaction of chlorophyll derivative was discussed.
其它诸如环烷系的芳构化与芳环系的最终缩聚等反应将导致焦炭的生成。
Other reactions such as aromatization of naphthenes systems and eventual condensation of the aromatic ring systems will produce coke.
本文提出一种基于生成树、弦和路径长度的环系最小环最小集识别方法，不需事先进行环系识别。
A new method not requiring ring system information for finding SSSR based on generating tree, chord and path analysis is set up.
戊烷沥青质中以迫位缩合的芳香环系结构为主，胶质组分中渺位缩合与迫位缩合的芳香环系结构各占相当比例。
The aromatic structure of pentane asphaltenes is mainly peri condensed, while for resins the proportion of cata condensed and peri condensed aromatic structures is comparable.
1980年，一位科学家在紫外线显微镜下观察骨骼碎片时注意到这些骨骼发出了幽幽绿光——这种绿色荧光是骨骼含有四环系抗生素的一种标志。
In 1980, a scientist looking at bone fragments under an ultraviolet microscope noticed the bones were glowing green — a hallmark of the antibiotic tetracycline.
四月，绕土星运行的机器人卡西尼号土星探测器拍了这张横穿太阳系最有名的环的窄角照片。
In April, the robotic Cassini spacecraft now orbiting Saturn took this narrow-angle view looking across the Solar System's most famous rings.
“尘埃环模型让我们有机会一睹太阳系在诞生初期时的面貌，”库切纳说。
"Our models of this ring let us sort of look back in time to when the solar system was young," said Marc Kuchner.
这个太阳系中最大的光环的轨迹距离土星800万英里，比其他土星环远50倍。
The ring, the largest in the solar system, surrounds the planet from a distance of 8m miles, about 50 times further out than the others.
妈妈说，如果我能够拥有一个魂环，那么，我就是一名控制系战魂师了。
Mother said, if I have a soul ring, then, I am a control system by division.
他们用环将那些东西系在一起。
高等院校的系办公室是整个学校管理体系中的重要一环，在教学、科研等各项工作中起着不可忽视的作用。
The work of the dean's office in the institutions of higher learning is an important link in the administration chain, which play an indispensable role in teaching, scientific research and other work.
与环氧、环氧沥青、沥青系、乙烯等体系的涂料配套使用。但不能与油性、醇酸、聚酯类油漆配套使用。
It can be compatible with epoxy, epoxy - tar, vinyl paint systems. but it is incompatible with oil base, alkyd, polyester coating systems.
菊绳，缝(或系)一些环的扁带。在器械攀登中用作可调节的扁带。
Daisy chain -a sling sewn (or tied) with numerous loops, used as an adjustable sling in aid climbing.
结论已建立受四环素调控的p37高效表达细胞系，为进一步研究p 37的功能和作用机制提供了实验细胞模型。
Conclusion: a stable cell line expressing p37 regularly was established, which provides a good cell model for studying p37 function and its molecular mechanism.
为改善逆变器系统在严重不平衡负载情况下输出电压的对称性，文中提出一种新颖的控制策略——旋转坐标系下的PIR - P双环控制。
This paper presents a new method that PIR-P dual loop control based on rotating coordinates to improve the output voltage symmetry of inverter under the serious unbalanced load condition.
环志是研究鸟类季节性迁徙的重要手段之一，同时也是研究鸟类区系、生态学、形态分类学等的有效方法。
Bird banding is one of the important means to research the seasonal migration of birds, and is an effective method in researching the faunas, ecology and morphology of birds.
环链拟青霉是一种虫生真菌，是皖南宣城敬亭山马尾松林生态系中的优势种，在松林控制害虫起到了至关重要的作用。
Paecilomyces cateniannulatus, an entomogenous fungus and one of the predominant species of the fungi in a Masson spine plantation ecosystem, plays an important role on forest pest control.
未来行星颗学家会持续研究春分点前后的影像，进而了解这个太阳系内拥有最大行星环的行星，动力成因与粒子分布特征。
Planetary scientists will be studying ring images taken near equinox to help better understand the dynamics and particle size distribution of the Solar system's most extensive ring system.
经过筛选确定苯系物、多环芳烃、有机氯农药、多氯联苯和挥发性卤代烃为主要污染物。
The main pollutants are benzene serial materials, polycyclic aromatic hydrocarbon, organochlorine insecticide, PCB and volatile halogenated hydrocarbon.
在直角坐标系中分别表示出了均匀带电椭圆形环在中心轴线上任意位置处的电势及电场。
In the rectangular coordinate system, we express the electric field intensity and different position electric field energy of the elliptical ring with positive electric charge in the central axis.
用环剥树皮等方法可以诱导多倍体无性系提早开花。
Girdling and other treatments can induce polypoid plants to flower earlier.
结果建立了CHL ？3a4转基因细胞系，双核细胞微核试验证明该细胞系能代谢活化黄曲霉毒素b 1 (afb1)、杂色霉菌毒素(STC)、环磷酰胺(CPA)。
Results It was proved that a CHL 3a4 transgenic cell line was established, which could lead metabolic activation for aflatoxin B1 (AFB1), sterigmatocystin (STC) and cyclophosphamide (CPA).
使用双极坐标系研究流体在偏心环空内的流动。
The bipolar coordinate system in which the two boundary circles of eccentric annuli become the coordinate surfaces is used.
许多摄影作品入选《走向老成都》、《世纪丰碑》、《情系二环》等画册，还有48幅照片入选有关摄影书籍。
Many photographs appeared in the "to old Chengdu", "Century Monument", "Love Ring" and other pictures, there are 48 photographs selected books about photography.
在分析行星轮与内齿环各段啮合情况的基础上，建立了行星齿环换向机构中系杆的角速度和角加速度计算模型。
Based on the meshing analysis of planetary gear and inner gear-ring, the angular velocity and angular acceleration calculation model of the rod is established.
因为土星环几乎纯粹由水冰构成-而外太阳系的物质构成通常是冰岩混合物。
Because the rings are almost pure water ice-and material in the outer solar system is generally an ice-rock mix.
因为土星环几乎纯粹由水冰构成-而外太阳系的物质构成通常是冰岩混合物。
Because the rings are almost pure water ice-and material in the outer solar system is generally an ice-rock mix.
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