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It,s allelchemicals were isolated through extraction, thin-layer chromatography, and column chromatograpathy. After the white clover was infused in ethanol and evaporation, the leavings was dissolved by water. The aqueous extract was extracted by petroleum,chloroform, ethyl acetate and n-Butanol successively, and the bioassay showed that the chloroform phase has obvious inhibitory effect, the inhibitory rate was 44.32%,88.08% on Abutilon theophrasti M., seedling length and root length, 82.08%,92.16% on Echinochloa crusgalli L., seedling length and root length, and the Amaranthus retroflexux L., germination rate is 0, the secondly was ethyl acetate phase.

运用萃取、薄层层析、柱层析等方法对白三叶草地上部分的化感物质进行初步分离,结果表明,白三叶草经乙醇浸提旋转蒸发后用蒸馏水溶解,依次用石油醚、氯仿、乙酸乙酯、正丁醇萃取,生物测定表明氯仿组分对杂草的抑制作用最强,对苘麻芽长和根长抑制率分别为44.32%、88.08%,对稗草芽长和根长的抑制率分别为82.08%、92.16%,反枝苋的发芽率为0;其次是乙酸乙酯相。

Regarding the open chain plane multibar performing mechanism as the object, this paper analyzes its establishing problem of dynamics equation from new degree, and this paper gives the new general formula to the similar velocity, similar angular velocity, inertial coefficient by turns.

文章以开式链平面连杆机构为对象,从新的角度探索分析其动力学方程的建立问题,文中依次对类速度、类角速度、惯性系数、广义力给出新的求解通式。最后用拉格朗日方程建立相应的动力学方程

Results showed activities of tourists have hardened the soil,reduced its organism content and water content, and increased its unit weight. Basically theseverity of the effects increases with the increase of tourist activity.The former scene of arborescence is now a tourist dense area.

对森林公园土壤的研究选择了四个景区:古驿道、毛竹林、竹类园和防火瞭望台,研究结果表明游客的活动使土壤的紧实度增加,有机质含量从2.33%减少到1.33%,土壤含水率34.42%从降低到21.87%,土壤容重从1.13 g/cm3增加到1.38 g/cm3,样地受影响的严重程度依次为竹类园>古驿道>防火瞭望台>毛竹林。

We iterate through all possible numbers that could possibly be factors of num, using the count variable and decrementing for every value that does not divide num.

我们迭代所有可能的约数, count 变量依次递减,第一个能整除 num 的就是我们要找的最大约数,找到后就不再再继续找了,使用 break 语句退出循环。

In the past more than one hundred years, the residential mobility of the cities in the Western countries has experienced urbanization, suburbanization, gentrification and several other trends successively.

人工居住环境是相对于居住环境中的自然环境和社会环境而言的。一百多年来,西方城市的人口迁居依次经历了城市化、郊区化和回归城市等几个潮流。

There was a process for managed currency system to be put forward and discussed.

学者们对管理通货制的认识是逐步深入的,依次从银本位、纸本位到最后的货币政策等不同角度提出并论述了

This thesis is a study about Cassirer's cultural forms of human activities in the synchronous perspective, which includes myth, religion, language, art, history, science and philosophy, and the study is also about their function in human life.

本章在内容上,是从共时性的角度依次展开了卡西尔对人类文化诸形式:神话、宗教、语言、艺术、历史、科学、哲学的研究,并以此揭示了它们在人类生活中的作用。

As an example,a systematic and careful assessment of the regional agriculture eco environmental quality condition in Wuhu City,Anhui Province,according to the monitoring data was given.The pollution of the regional agr...

结果表明:安徽省芜湖市区域农业生态环境已经受到了明显的污染,并且各区域污染水平具有一定的差异;芜湖市区域农业生态环境质量优劣的关联序依次为:南陵县、芜湖县、繁昌县和城市郊区。

Rudolph Bloom narrated to his son Leopold Bloom (aged 6) a retrospective arrangement of migrations and settlements in and between Dublin, London, Florence, Milan, Vienna, Budapest, Szombathely with statements of satisfaction (his grandfather having seen Maria Theresia, empress of Austria, queen of Hungary), with commercial advice (having taken care of pence, the pounds having taken care of themselves).

581鲁道尔夫。布卢姆在对其子利奥波德。布卢姆回顾着自己过去怎样为了依次在都柏林、伦敦、佛罗伦萨、米兰、维也纳、布达佩斯、松博特海伊之间搬迁并定居所做的种种安排;还做了些踌躇满志的陈述(他的祖父拜见过奥地利女皇、匈牙利女王玛丽亚。

At Edgewood Arsenal, soldiers were given L.S.D. and then confined to sensory deprivation chambers and later exposed to a harsh interrogation sessions by intelligence people.

在Edgewood Arsenal,士兵被给了L.S.D,并被关在一个感官被剥夺的室内,接着又受到情报人员的依次粗暴的拷问。

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推荐网络例句

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了,但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场,你等着挨绳子吧!

Several theories about reigniting and extinguishing of the arc have been refered.

本文综合考虑了几种电弧重燃和熄灭理论。