《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。
白杨树上的乌鸦在上空呱呱乱叫。
道路的两边分列着整齐的白杨树。
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.
白杨树笔直地挺立在北 方的旷野上。
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.
风吹着白杨树叶沙沙地响。
河堤上的马用鼻子轻蹭着粗糙的棉白杨树。
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.
这对雄海狸来说可不是好事，因为没有了白杨树它们无法在河溪里筑坝。
And that was a problem for Johnny beaver, because without the aspens he couldn't dam the rivers and streams.
天快要黑的时候，我们从白杨树里伸出头来，向上下游和眼前河面望了一阵。
When it was beginning to come on dark, we poked our heads out of the cottonwood thicket and looked up and down, and across.
当火车进入陕西省境内时，我就开始留意车窗外了，为的是一睹白杨树的风采。
When the train enters border of Shaanxi Province, I begin to look out for car outside the window, in order to see the elegance of the white poplar.
以前有研究声称，狼可以阻止驼鹿吃白杨树，而一项最近的研究表明事情可能并非如此。
Previous research claimed the wolves were helping to stop elk from eating aspen trees but a new study suggests this may not be the case.
大棉白杨的旁边，是一小片冬天落叶的棉白杨树林，长在那条宽阔多沙的河谷中。
The big cottonwood tree stood apart from a small grove of winter bare cottonwoods which grew in the wide, sandy, arroyo2.
然后尼洛起身走到茅屋门口，站在寂静的秋夜里，望着星星及随风摇曳的大白杨树。
Then Nello rose and went to the door of the hut, stood in the quiet autumn night, and watched the stars and the tall poplars bow in the wind.
关山的森林覆盖率达到了36.56%以上，主要树种包括：桦树、白杨树、椴树。
The mountain forest coverage rate is 36.56% , main species including birch , poplars , lime tree .
《蒙娜丽莎》的原作是一幅画在白杨树板上的油画，如今收藏在巴黎的罗浮宫博物馆。
Mona Lisa is an oil painting on a board of poplar and is housed at the Louvre Museum in Paris.
在一片稠密却光秃的白杨树丛掩蔽之下，有一所用圆木造的大房子，粉刷洁白，坚固结实。
Sheltered by thick but bare bluffs of aspens, stood a large house, built of logs, White-washed, solid.
溪水的轰鸣声横冲直撞地进入竹篱笆，再绕过一排高大的白杨树，把他们俩的谈话轻轻卷走。
The roars of stream water dashed into the bamboo fence recklessly, made a detour around a row of tall poplar, then caught their conversation away with it gently.
他们乘一只摆渡船过了河，默不作声地骑了一大段路，那时候，暮色慢慢地落在白杨树的后面了。
They crossed the river by a ferry, and rode long time in silence, while the twilight slowly fell behind the aspens.
他们乘一只摆渡船过了河，默不作声地骑了一大段路，那时候，暮色慢慢地落在白杨树的后面了。
They crossed the river by a ferry, and rode long time in silence, while the twilight slowly fell behind the aspens.
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