有些树已经开始落叶了。
Some of the trees were already beginning to shed their leaves.
苹果树、梨树和樱桃树在落叶之后就可以被修剪。
Apples, pears, and cherries can be pruned back when they've lost their leaves.
棕色的落叶，在冰冷的空中翻滚、飞舞，掩埋她。
Brown leaves were tumbling, flying wildly in the frozen air and reburying her.
然而，在一些地区，阔叶落叶树木形成了林木线。
There are some areas, however, where broadleaf deciduous trees form the timberline.
起初，他以为那不过是落叶声，因为那声音很轻很细。
He thought it was only falling leaves at first, so slight and delicate was the sound of it.
这样会使落叶集中起来，并且去除较大的树叶和树枝。
This will concentrate the litter and remove larger leaves and twigs.
这使得我们更容易发现蚂蚁，并在它们逃到周围落叶层之前抓住它们。
This makes it easier to spot ants and to capture them before they can escape into the surrounding leaf litter.
最成功的收集方法之一是，收集那些有蚂蚁在觅食的落叶，从中取出蚂蚁。
One of the most successful ways to collect them is to gather the leaf litter in which they are foraging and extract the ants from it.
例如，外来植物的入侵可能会改变落叶的数量，从而改变对土壤的营养贡献。
For example, an invading nonnative plant could alter the quantity of leaf litter production, which would alter nutrient contributions to the soil.
最常见的做法是把落叶放在一个大漏斗之上的筛子里，通常在一定的温度下进行。
This is most commonly done by placing leaf litter on a screen over a large funnel, often under some heat.
互花米草，又称绳草，是一种落叶的多年生开花植物，原产于美国的大西洋沿岸和墨西哥湾沿岸。
Spartina alterniflora, known as cordgrass, is a deciduous, perennial flowering plant native to the Atlantic coast and the Gulf Coast of the United States.
然而那个地区当地的常绿松树可以为雪遮阴，吸收辐射，而白桦树在冬天则会落叶，从而使辐射被雪反射。
Whereas the region's native evergreen pines shade the snow and absorb radiation, birches would shed their leaves in winter, thus enabling radiation to be reflected by the snow.
落叶在风中旋转。
不要为落叶而伤心。
大风过后，到处都是落叶。
有个古老的成语叫“落叶归根”，意思是年老时回到自己的家乡，就像落叶返回树根一样。
One old idiom is "luoyeguigen", which means returning to one's homeland at the old age, like fallen leaves return to the roots of their trees.
我懒得清扫落叶，也从不除草，任其迅速生长。
I was too lazy to sweep the fallen leaves, and I never pluck grass, allowing it to grow rapidly.
地上的落叶像一层厚厚的毯子。
如果他整夜都待在落叶松的树林中，他就听不到田庄里的骚动。
If he had remained among the larches all night, he would have heard nothing of the stir at the Grange.
雄鹿窝通常出现在秋天落叶之后，也就是发情之前或发情期间。
Buck scrapes are generally created after leaf-fall in autumn, which is just before or during the rut.
短期影响包括与害虫活动直接相关的干扰，可能导致树木落叶、失去活力或死亡。
Short-term effects include the disturbances directly associated with the action of the pest, which may cause the defoliation, loss of vigor, or death of trees.
啪嗒声越来越响，到最后听起来像是突如其来的冰雹落在他周围的厚厚的落叶上的声音。
The pattering increased till it sounded like sudden hail on the dry leaf-carpet spread around him.
在几乎光秃秃树下，落叶像地毯一样铺在地上，背景里的绿色草地，留下了逝去的夏天的回忆。
A carpet of fallen leave beneath nearly bare trees, with green grass in the background serving as a memory of the summer gone by.
在美国东北部，舞毒蛾毛虫的大规模侵扰导致数百万英亩的树木落叶，这是一个反复出现的现象。
The defoliation of millions of acres of trees by massive infestations of gypsy moth caterpillars is a recurring phenomenon in the northeastern United States.
进一步的研究表明，毛虫对萎蔫病毒几乎具有免疫力，因为它们赖以为生的树木会对越来越多的落叶做出反应。
Further research has shown that caterpillars become virtually immune to the wilt virus as the trees on which they feed respond to increasing defoliation.
进化论的作者、年轻的英国植物学家查尔斯·达尔文，是第一个看到落叶柏树干圆周长达一百三十英尺的欧洲人。
A young English botanist named Charles Darwin, the author of the theory of evolution, was the first European to see alerces, with trunks that had a circumference of 130 feet.
孢粉表明温带气候地区温暖凉爽，表明落叶林和阔叶林的分布广泛。
Sporopollen implies warm-cool and moist climate of temperate zone, suggesting wide distribution of deciduous and latifoliate forests.
一片落叶预示着秋天的来临。
我把漂亮的落叶当作礼物送给每一个人。
楼下花园里扫成一堆的落叶上点起了篝火。
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