丁

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。

The selective response of Holotrichia oblita to different plant volatiles (1) By steam distillation and dichloromethane, in the Y-tube olfactometer bioassay, the crude extract from castor-oil plant leaves was obviously attractive to female and male of Holotrichia oblita than cotton, Abutilon theophrasti Medic, control dichloromethane.

该结果表明，蓖麻叶片粗提物中含有引诱华北大黑鳃金龟的化学物质。(2)华北大黑鳃金龟成虫对8种化合物的嗅觉仪行为反应结果表明，无论对雌虫还是雄虫，肉桂醛、邻苯二甲酸二丁酯、苯酚、香草醛、苯甲醛的诱虫活性显著高于顺-3-己烯醇。

The Abyssinian Satin is furthermore distinguished by the brilliant sheen, or "shininess" of it's coat.

阿比西尼亚色丁是进一步著称的辉煌光泽，或"光亮"它的衣服。

Just as Adam Clayton Powell is a Christian minister who heads the Abyssinian Baptist Church in New York, but at the same time takes part in the political struggles to try and bring about rights to the black people in this country; and Dr. Martin Luther King is a Christian minister down in Atlanta, Georgia, who heads another organization fighting for the civil rights of black people in this country; and Reverend Galamison, I guess you've heard of him, is another Christian minister in New York who has been deeply involved in the school boycotts to eliminate segregated education; well, I myself am a minister, not a Christian minister, but a Muslim minister; and I believe in action on all fronts by whatever means necessary.

正如亚当克莱顿鲍威尔是一个基督教的部长一样，他作为在纽约阿比西尼亚施洗约翰教堂的首领，同时，也参加了政治斗争来争取并提出关于我们国家黑人的权利；马丁路德金也是一个基督教部长，沿着亚特兰大和乔治亚他作为另一个为了我们国家黑人的权利组织斗争的首领；尊敬的卡勒密斯教士，我猜想大家都听说过他，他是另一个在纽约的基督教部长，他已经深深地潜心于罢课来消除隔离的教育；我自己本身也是部长，不是基督教部长而是穆斯林教部长，我相信在斗争的所有阵线上，无论哪一个条阵线都是必要的。

Augustine's ordination, unexpectedly forced upon him by popular acclamation during a visit to Hippo in 391, brought about a fundamental change in his life and thought.

奥古斯丁的协调，没想到强加在他的鼓掌欢迎访问期间，河马在391 ，带来了根本的改变，他的生活和思想。

Celia intended to be equally discreet, which was why she accepted the fact accomplished of no more

西莉亚也打算同样慎重，这也是她接受既成事实，不准备再同马丁幽会的原因。

Acenaphthene was dehydrogenated to afford acenaphthylene by photochemical reaction with N bromosuccinimide in benzene with the addition of quinoline at room temperature and atmospheric pressure was studied.

在常温常压下，以苯作为溶剂，加入喹啉，使苊与N－溴代丁二酰亚胺发生光化学脱氢反应生成苊烯。

Under these conditions,the yield of butyraldehyde glycol acetal was 68.1%.

在此优化条件下，丁醛乙二醇缩醛的收率可达68.1%。

Acetaldehyde generated from the 2 - butene aldehyde carbonyl and the reaction is the condensation of methylene ...

由乙醛生成2－丁烯醛的反应是羰基与亚甲基发生缩合的。。。

In this paper, acetanilide used as start material was chlorosulfonated, then reacted with alkylamines with different length of carbon chain to prepare 4 p-acetylaminophenylsulfonylalkylamine.

本文以乙酰苯胺为起始原料，经氯磺化后分别和不同碳链的正烷基胺反应制得4种不同碳链长度的对乙酰氨基苯磺酰烷基胺，将其水解后制得了对氨基苯磺酰正丁胺、对氨基苯磺酰正辛胺、对氨基苯磺酰正十二胺和对氨基苯磺酰正十八胺。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。