澳洲科学家在桉树叶里找到了黄金-凯发k8官网

澳洲科学家在桉树叶里找到了黄金
文章来源:未知 文章作者:enread 发布时间:2015-01-05 05:08 字体: [ ] 
(单词翻译:双击或拖选)

money really does grow on trees - at least in australia.

 

scientists have found gold in the leaves of 1 trees.

 

the particles are much too small to be seen with the naked eye but have been detected using a type of x-ray that is especially good at picking up trace amounts of metals and minerals.

 

however, gold hunters shouldn't start felling gum trees in the hope of becoming rich.

 

study leader mel lintern told the brisbane times: 'if you had 500 eucalyptus trees growing over a gold deposit, they would only have enough gold in there to make a wedding ring.'

 

the real value of the study is that nature's own version of gold leaf could provide mine companies with an inexpensive and environmentally friendly 2 of where to drill test sites.

 

the study by the 3 scientific and industrial research 4 in western australia showed levels of the precious metal were highest in trees growing directly over gold seams, one of which was 115 feet down.

 

the researchers believe the gold was taken up by the trees' extensive roots from while 5 for water during times of drought.

 

it was then transported through the tree to the leaves, where concentrations are higher than in the 6, trunk or surface soil.

 

the researchers said: 'gold is probably 7 to plants and is moved to 8, such as leaves in order to reduce deleterious biochemical reactions.'

 

writing in the journal nature communications, they said it was the first time that gold had been found naturally incorporated into a living thing.



点击收听单词发音收听单词发音  

1 jnaxm     
n.桉树,桉属植物
参考例句:
  • eucalyptus oil is good for easing muscular aches and pains.桉树油可以很好地缓解肌肉的疼痛。
  • the birds rustled in the eucalyptus trees.鸟在桉树弄出沙沙的响声。
2 i8nxm     
n.指标;指示物,指示者;指示器
参考例句:
  • gold prices are often seen as an indicator of inflation.黃金价格常常被看作是通货膨胀的指标。
  • his left-hand indicator is flashing.他左手边的转向灯正在闪亮。
3 xxzyp     
n.共和国,联邦,共同体
参考例句:
  • he is the chairman of the commonwealth of artists.他是艺术家协会的主席。
  • most of the members of the commonwealth are nonwhite.英联邦的许多成员国不是白人国家。
4 organisation     
n.组织,安排,团体,有机休
参考例句:
  • the method of his organisation work is worth commending.他的组织工作的方法值得称道。
  • his application for membership of the organisation was rejected.他想要加入该组织的申请遭到了拒绝。
5 02d824effe8b78d21ec133da3651c677     
擦[洗]净,冲刷,洗涤
参考例句:
  • the police are scouring the countryside for the escaped prisoners. 警察正在搜索整个乡村以捉拿逃犯。
  • this is called the scouring train in wool processing. 这被称为羊毛加工中的洗涤系列。
6 17ff1ed5da672aa443a4f6befce8e2cb     
细枝,嫩枝( twig的名词复数 )
参考例句:
  • some birds build nests of twigs. 一些鸟用树枝筑巢。
  • willow twigs are pliable. 柳条很软。
7 inswc     
adj.有毒的,因中毒引起的
参考例句:
  • the factory had accidentally released a quantity of toxic waste into the sea.这家工厂意外泄漏大量有毒废物到海中。
  • there is a risk that toxic chemicals might be blasted into the atmosphere.爆炸后有毒化学物质可能会进入大气层。
8 atozar     
n.端点( extremity的名词复数 );尽头;手和足;极窘迫的境地
参考例句:
  • she was most noticeable, i thought, in respect of her extremities. 我觉得她那副穷极可怜的样子实在太惹人注目。 来自辞典例句
  • winters may be quite cool at the northwestern extremities. 西北边区的冬天也可能会相当凉。 来自辞典例句
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