The results showed that the mean proportion of polymorphic loci ( ppb ) of anabasis aphylla, which comprised 3 subpopulations ( 58 individuals sampled ), generated by 16 primers was 94. 56 %, the value of ppb of ceratocarpus arenarius, which had 4 subpopulations ( 80 individuals sampled ), using 16 primers was 98. 00 %. the paper had proved that the higher genetic diversity and the genetic differentiation existed in the populations of boih anabasis aphylla and ceratocarpus arenarius, while the latter had much more genetic diversity than the former. moreover, the study discussed the shannon information index and nei ' s gene diversity index of the two species natural populations, which indicated that there were more genetic variations within the subpopu
另外,通過rapd資料的聚類分析及相關性分析研究,發現無葉假
木賊和角果藜自然種群的遺傳結構與綠洲沙漠過渡帶的微生境生態因子(主要是土壤因子)相關,其中無葉假
木賊亞種群遺傳
多樣性水平不僅與土壤含水量( w ) 、鉀鈉離子濃度( k + na )和氯離子濃度( cl )呈顯著的正相關( p 0 . 05 ) ,還與土壤中有機質( som ) 、全氮( nt )和全磷( pt )含量呈顯著的負相關;同時,角果藜種群的遺傳
多樣性水平與土壤中有機質( som )和全氮( nt )含量呈顯著的正相關,而與co _ 3 ~ ( 2 - )濃度呈顯著的負相關;除此之外,其它土壤生態因子與兩物種遺傳
多樣性水平的相關性均不顯著(卜0 . 05 ) 。
The andes mountains are hurt by humans because they cut down trees which shelter many unique andean animals
安地斯山被人類破壞由於人類大量的砍伐樹
木,很
多的安第斯山脈珍惜動物都是靠這些樹來建窩。
A prin cipal reason was that most trees, unlike annual plants, cannot readily be propagated from cuttings
一個主要的原因就是不像一年生植物,大
多數林
木經過砍伐之後,不能馬上繁殖。
Trifles loom large to an anxious mind.
顧慮
多的人,草
木皆兵。
There were so many changes here--great new apartment houses with lawns and trees around them; hideous old eyesores removed.
這里的變遷非常大--許
多新建的公寓大樓,周圍有草地和樹
木,醜陋的舊建築拆了。
Patton, rommel ' s old rivalry, was sent to dover on the other side of the strait to command a fictional american army group and make large scale construction prepared for allied landing operations
隆美爾的老對手? ?美軍名將巴頓,被派到了
多佛爾地區,指揮一個並不存在的美國集團軍,並且為登陸作戰構築大規模土
木工程。
Sugar substitutes such as aspartame, saccharin and xylitol have been widely available for several years now
糖替代品,如阿斯巴甜糖精和
木糖醇,至今都已廣泛使用了很
多年。
Over the years a ragged secondgrowth of aspen and birch and speckled alder, at the far edge of the baseball diamond, has blotted out that view.
棒球場外圍伐過的樹林,
多年以來又長出了參差不齊的白楊、白樺和滿身斑點的榿
木,擋住了視野。
Garrigue scrub woodland a secondary formation derived from the original mixed forest, characteristic of limestone areas of the mediterranean region, with low rainfall and thin, dry soils
咖里哥宇群落:是(地中海區常綠矮灌
木)
多矮小植物,起源於原始混合森林的次級群落,該群落具有的低降雨量及稀薄幹燥的土壤,是地中海石灰巖地區的特徵。
Ten to twenty times more trees were reported in parts of southern niger in 2005 than there were 30 years earlier. some reclaimed land can now be farmed again. tha land became infertile during the 1970s and early 80s. but about 20 years ago, local farmers recognize that their onceproductive soil was being carried away by severe winds
在2005年大部分南部尼日地區的樹
木比30年前的樹
木多出了10到20倍的數量.一些開墾土地現在又可以被耕種了.那塊土地在70年代和早期的80年代變得開始不肥沃.但是大約20年之前,當地的農民意識到他們過去
多產的土地正在被嚴峻的天氣所破壞
The king made silver as common as stones in jerusalem and cedars like the sycamore - trees of the lowlands in number
王在耶路撒冷使銀子
多如石頭,香柏
木多如高原的桑樹。
I will increase the fruit of the trees and the crops of the field, so that you will no longer suffer disgrace among the nations because of famine
30我必使樹
木多結果子,田地
多出土產,好叫你們不再因饑荒受外邦人的譏誚。
Stu : thanks for your help, make. we ' ll make short work of this
史都:三
木,
多謝你的幫忙。我們可以縮短工作了。
Seeing how dry the pines were
看這松木多干啊