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Bidens pilosa var. radiata, one of the rapid expanding invasive weeds, has become prevailing throughout Taiwan. A study on the result enhanced by the breakdown of geographic isolation with the native varieties in genetic variation, population structure and introgressive hybrization is really in need. In this study the genetic variation and population structure among the varieties of Bidens pilosa complex were studied using ISSR markers.

在台湾Bidens pilosa种群在外部形态及分布上均非常类似,加上大花咸丰草又属极具侵略性的新归化种,在与其他自生变种又无明显隔离下,是否增加种间之交流与渐渗杂交之机会及对族群结构的影响,实有深入探讨之必要。

As for the ovalization-curvature curve, it can be observed that the ovalization increases in a ratcheting manner with the number of the bending cycle. When the magnitude of the ovalization reaches a critical value, the tube buckles.

至於在椭圆化-曲度的曲线图中显示,椭圆化会随著循环弯曲的圈数渐增且呈现对称棘齿的变化,当椭圆化值增加到某一极限时,薄壁圆管便会发生皱曲破坏。

Owing to the progressive accumulation of the ovalization of the tube cross-section during cyclic bending, the tubes buckle eventually.

从椭圆化-曲度的实验曲线中显示,在对称曲度循环弯曲负载时椭圆化会渐增且呈对称棘齿的变化,椭圆化会一直增加直到钢管发生皱曲。

The prevalences of tricuspid and pulmonic regurgitation increased with age, reached the peak values at the age of 8-9 years of age, and decreased gradually afterwards.

三尖瓣、肺动脉瓣返流的发生率随年龄增长而增加,8~9岁时达高峰,随后渐下降;二尖瓣及主动脉瓣返流发生率随年龄改变不明显。

The fresh weight and basal diameter of the cut curcuma flowers decreased with time after harvested without inserted them into water immediately. Thus, the vase life decreased. The even of the off-water time is only 30 minutes. One gram of fresh flower can absorb 30-40mg of fresh water, and the vase life increased 2-4 days if the stem base were recut, The curcuma flower per se after carting didn't posses peak of respiration and release of ethylene as well.

姜荷花切花采收后随著离水时问增长,鲜重与花茎基部直径渐减,瓶插寿命亦随之缩短,离水仅0.5小时切花即明显受要影响,花茎基部重新切除可增加10-20mg/gF.W的吸水量,而延长瓶插寿命,但同样随著离水时间延长而降低瓶插寿命。

Any given oil well has a finite supply of oil, and the wells' production follows the shape of a bell curve. Extracting oil is cheap and easy on the curve's upslope but after the the well has peaked – the point at which half of the well's oil has been extracted – production becomes more difficult and expensive. The output of the well begins to decline and will never recover; production falls steadily and the cost to extract the oil rises.

由於任何一个油井都只有固定的供应量,因此每个油井的原油产量都会遵循钟型曲线:一开始汲取原油很便宜也很容易,因此曲线是上升的,但当油井的产量到顶之后–也就是油井中的原油存量已被汲取出一半时–原油的生产就会变得愈渐困难且昂贵,油井的输出产量也开始下降,而且再也无法恢复,所以产量也将持续减少、使得生产成本不断增加。

But at the same time,itexisted in the fact that the water environment was amended,showingthat many lakes and ponds such as Hong Jiannuo Lake appearing andexpanding in the end of Qing dynasty.4.The vegetation in Mu Su Desert passed through several phases inhistorical times,the main phases are:the species composition ofvegetation community was gradually simplified;xeromorphous and sandyplant increased;the status of desert vegetation rose evidently.However,the change of vegetation zonation means that forest plainchanged into drought plain did not occur.5.The main modality of Mu Su Desert land degenerating has beendesertification,it had occurred before human activities intervenedintensively.Two-thirds of land has been desertification at variousdegrees.

但与此同时,也存在着局部的水环境改善,突出表现为红碱淖等湖沼在清末民初的出现和扩大。4、毛乌素沙地的植被在历史时期经历了群落种类组成渐趋简单、旱生沙生资源植物增加、荒漠植被地位明显上升等变化,但是并不存在由森林草原到干草原的地带性植被变化。5、沙漠化是毛乌素沙地土地退化的主要表现形式,在人类活动强烈干预以前就存在着,秦汉以来,有大约2/3的土地发生了程度不同的沙漠化。

However, the aggregation of nanoparticles occurred with increasing particle concentration due to the strong magnetic interaction between particles. This caused the disordering of composite.

然而,随著粒子浓度的增加,由於磁性粒子间的磁性作用力,粒子聚集的现象也渐趋严重,这也造成复合物变为不规则的形态。

It has laid the burden of adjustment disproportionately on the low-skilled, the young and immigrants.

在欧洲,移民占劳动力的比例渐增,这亦增加了一个引起失业的不确定因素。

The value of the hardness of mung bean decreased as the soaking time increased. On the other hand, the hydration rate constant of mung bean increased, but the equilibrium of the moisture content decreased. Higher temperature could be conducive to reaching an equilibrium of the moisture content and shorten soaking time. On the microstructure, observation soaking could promote mung bean seed coat to absorb water, that might make its spongy mesophyll swell and inner wrinkly structure more smooth . During soaking at 50℃ and 70℃ for two hours, the surface and palisade parenchyma of the mung bean seed coat cracked, and pectic substances of the middle lamella were loss. Because of this, soaking rate could raise and shorten the soaking time.

在硬度测试中,则呈下降趋势;在绿豆吸水特性方面,其吸水速率常数呈增加趋势,而水分平衡常数则呈下降趋势;浸渍温度之提升有助於达到浸渍平衡及缩短浸渍时间;配合绿豆微细构造之观察,种皮会因浸渍、吸水,种皮外表的多角形海绵组织会有膨大情形,内部皱摺状构造则渐趋平滑;在50℃、70℃浸渍二小时,绿豆种皮之表皮、栅状组织会有破裂,海绵组织及中胶层果胶会有流失情形,因而使绿豆之浸渍速度提升与缩短浸渍时间。

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推荐网络例句

If you are unfortunate enough to the lovelorn, please tell me, I will help you out, really, please contact me!

如果你不幸失恋了,请告诉我,我会帮助你摆脱困境,真的,请联系我啦!

China's plan to cut energy intensity by 20 percent and pollutant discharges by 10 percent between 2006 and 2010 is a case in point.

中国计划在2006年到2010间降低20%的能源强度和减少10%的主要污染物排放,就是一个这样的例子。

Well, Jerry would rattle off all the details of that movie.

那么,杰瑞会急促背诵那部电影所有细节。