《蒙娜丽莎》的原作是一幅画在白杨树板上的油画，如今收藏在巴黎的卢浮宫博物馆。
The original Mona Lisa is an oil painting on a board of poplar and is housed at the Louvre Museum in Paris.
自然发生的森林火灾甚至比山体滑坡或积雪更能促进白杨树的生长。
Even more than mountainside slides of mud or snow, naturally occurring forest fires promote the survival of aspen trees.
相反，针叶树将侵入白杨树林的边界，越来越多地遮挡白杨所需的阳光。
Instead, coniferous trees will invade the aspen grove's borders and increasingly block out sunlight needed by the aspens.
当灯光再次亮起时，塞巴斯蒂安注意到约翰脸色像死一般惨白，像一片白杨树的叶子一样在颤抖。
When the light was lit again, Sebastian noticed that John was deadly pale and trembling like an aspen leaf.
他们发现，在富含单宁酸的橡树叶上，病毒杀死毛虫的效果要比在白杨树叶子上的效果差得多，因为白杨树叶子的酚含量较低。
They found that on tannin-rich oak leaves, the virus is considerably less effective at killing caterpillars than when it is on aspen leaves, which are lower in phenols.
白杨树的树叶转变为秋天的颜色。
白杨树林往往是一个很大的有机体。
在北半球很多地方都能发现白杨树。
The poplar tree is found in many places in the northern half of the world.
道路的两边分列着整齐的白杨树。
这儿曾经有过一棵高大的白杨树。
该处曾有一棵高大的白杨树。
在佐治亚州中部，生长有大量的枫香树和白杨树。
In central Georgia, sweetgum and poplar trees grow in large Numbers.
我赞美白杨树那挺拔的树干。
白杨树笔直地挺立在北 方的旷野上。
白杨实在是不平凡的，我赞美白杨树！
The white poplar is no ordinary tree . Let me sing its praises.
白杨树叶转成金黄，苍鹰在高空盘旋。
Around me, aspen leaves twirled bright yellow. Far above, an eagle soared.
白杨树实在是不平凡的，我赞美白杨树！
The white poplar is no ordinary tree. Let me sing its praises.
风吹着白杨树叶沙沙地响。
他们在一棵高大的棉白杨树下找到了他。
河堤上的马用鼻子轻蹭着粗糙的棉白杨树。
白杨树下有一条长凳。
白杨树长得又直又高。
道路两旁有白杨树。
一棵白杨树刺破暗兰色的天空，碰到一颗白星。
A poplar pierced up into the dark-blue sky and touched a white star there.
过一会儿，我们在几棵白杨树下找到一块荫凉地。
After a while, we found a shady place under some poplar trees.
白杨树在哭泣。
过了一会儿，我们在几棵白杨树底下找到一块阴凉的地方。
After a while, we found a shady place under some poplar trees.
滑雪索道悬吊在白杨树上空，白杨树的叶子刚刚开始染上一丝黄色。
Ski lifts idled above aspens, their leaves just beginning to show a tinge of yellow.
滑雪索道悬吊在白杨树上空，白杨树的叶子刚刚开始染上一丝黄色。
Ski lifts idled above aspens, their leaves just beginning to show a tinge of yellow.
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