根出的

Covalent modification of four isolated alkannin derivatives (alkannin, acetylalkannin,β,β dimethylacrylalkannin and β acetoxyisovalerylalkannin, respectively) on rabbit muscle latate dehydrogenase and yeast Alcohol Dehydrogenase has been studied.

为研究紫草萘醌类化合物的细胞毒性作用机制，从新疆软紫草根中分离出四种紫草萘醌类化合物β，β二甲基丙烯酰阿卡宁(1)，乙酰阿卡宁(2 )，β乙酰氧基异戊酰阿卡宁(3)和阿卡宁(4)。

Sagan and his co-author George Mullen hypothesized that carbon dioxide (CO2) concentrations were much higher during the Archean—possibly 100 times higher than they are today—and therefore the atmosphere could retain enough heat to keep the planet from freezing.

萨根及同事乔治·马伦提出假设：在太古代期间，二氧化碳浓度要高得多——可能比现在高出100倍，因此大气中可能保留了足够的热量，使地球免于冻结。

The result indicated that 237 combinations amplified a total of 13 079 AFLP fragments with an average of 55 fragments, the average of 1.30 markers per 1 000 AFLP fragments were found to be linked to clubroot resistant gene; the amplified polymorphic fragments were 3 167 between the two parents, account for 24 percent of polymorphic frequency; the number of amplified fragments and the number of polymorphic fragments was in positive linear correlation; GC content of AFLP primer combinations significantly affects the number of amplified fragments and the number of polymorphic fragments, indicating negative linear correlation between them.

结果表明：平均每个组合检测到55条带，共扩增13079条带，平均每1000条带检测到1.30个根肿病抗性基因连锁标记；多态性带数为3167条，双亲间多态性频率约为0.24；扩增带数与多态性带数呈线性正相关，引物组合中的不同GC含量与扩增带数和多态性带数存在显著性差异，并表现出线性负相关。

By using the Graham scanning for the convex hull extraction and fitting these convex hull points with the conics,roots of the conics are regarded as points we need.

采用格雷厄姆扫描法对包络进行凸壳提取，并用二次曲线拟合凸壳点，计算出拟和曲线的根。

All the contents of Extractable heavy metal like Pb, Cu, Zn and Cd in limestone slagged wasteland are higher than those in contrapositive soil nearby. The slag filtrate has no effect on seed germination rate of Mung beans, Broad beans and Corns but restrains their germination vigor and protraction of hypocotyls with root restraint rate exceeding 30-50%; While it has an apparent effect on germination rate and germination vigor of sensitive seeds like Beans with P=0.05. Simulate to plant the 4 different seeds in pot for a month, Test groups have a lower data in total leaf area, plant height and weight but a much higher content of protective materials like PRO and MDA in biochemical mensuration experiment compared with CK group.

石灰炉渣废弃地中Pb、Cu、Zn、Cd重金属有效态含量均高于临近对照土壤，其炉渣淋出液对绿豆、蚕豆、玉米3种植物种子发芽率无影响，但均抑制其发芽势和下胚轴伸长，根长抑制率达30%~50%以上，对敏感种子黄豆的发芽率、发芽势（4d）影响明显，摸拟盆栽一个月苗期，4种植物试验组在总叶面积、株高、生物量方面均低于对照组；生理生化测定，4种植物其体内抗逆性保护物质脯氨酸和膜过氧化产物丙二醛含量试验组均高于对照组。

They'll try to find out what caused a repair on the bridge to fail and send a 5,000-pound crossbeam and two rods into rush hour traffic.

他们试图找出是什么原因导致修复桥梁失败，并在高峰时间交通运送5000磅重的横梁和两根支撑柱。

University of Michigan and Delft University of Technology in the Netherlands decided to find out exactly what arm swinging did or did not achieve.

美国密西根大学与荷兰台夫特科技大学的研究人员，决定找出究竟双臂摆动有无任何作用。

By the methods of reducing order and Euler s eigenvalues,we obtain the general solution formula to one kind of systems of three dimensional second order ordinary differential equation with constant coefficients.

采用降阶和特征根方法，给出了一类三维二阶常系数微分方程组的通解公式，并通过算例与拉氏变换法进行了比较。

If a certain springing lightness is the characteristic of Chenonceaux, if it bears in every line the aspect of a place of recreation – a place intended for delicate, chosen pleasures – nothing can confirm this expression better than the strange, unexpected movement with which, from behind, it carries itself across the ricer.

如果所舍农索的特色是一种春天般的轻盈飘逸，如果所舍农索的特色是一种春天般的轻盈飘逸，它的每根线条都显示出一个娱乐场所的样式——一个为细腻，精选的快乐准备的地方————一个为细腻——没有什么比那奇异而出人场所的样式——一个为细腻，精选的快乐准备的地方——没有什么比那奇异而出人意料的行为更能证明这种表现了：城堡的后面居然跨过了河流。

That, however, is what has happened: from the trunk of that tree of vengefulness and hatred, Jewish hatred—the profoundest and sublimest kind of hatred, capable of creating ideals and reversing values, the like of which has never existed on earth before—there grew something equally incomparable, a new love, the profoundest and sublimest kind of love—and from what other trunk could it have grown?

可这是个大事：从那报复的树干中，从那犹太的仇恨中，从那地球上从未有过的最深刻、最极端的、能创造理想、转变价值的仇恨中生长出某种同样无与伦比的东西，一种新的爱，各种爱中最深刻最极端的一种：——从其它哪根树干中能够长出这种爱？

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。