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These tree belts effectively protect the farmland against shifting sand.是什么意思？

These tree belts effectively protect the farmland against shifting sand.

这些防护林带有效地保护了农田,使之免受流沙侵袭.

相关词汇
these tree belts effectively protect the farmland against shifting sand

these

adj. 这些的；pron. 这些；
例句
There's lots of money about these days for schemes like this.
近来这类计划资金充足。

tree

n. 树，木料，树状图，宗谱；vt. 把…赶上树，使处于困境，把鞋型插入（鞋内）；
例句
If the soil is allowed to dry out the tree could die.
如果听任土壤变干，树木可能会枯死。

belts

n. 腰带( belt的名词复数 )，区域，传送带，带状物；
例句
The film belts along at a cracking pace.
影片节奏紧凑。

effectively

adv. 有效地，实际上，事实上；
例句
The border, effectively closed since 1981, will be opened as of January the 1st...
实质上从1981年就已关闭的边境将于1月1日开放。

protect

vt. 保护，保卫，贸易保护，备款以支付；
例句
It has been claimed that wine helps protect against heart disease.
有人声称葡萄酒有助于预防心脏病。

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；
例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

farmland

n. 农田，耕地；
例句
The company owns a chunk of farmland near Gatwick Airport.
该公司拥有盖特威克机场周边的大片农田。

against

prep. 反对，对…不利，紧靠，以防；
例句
His hand brushed against hers; it could have been either accidental or deliberate.
就在有意无意间，他的手轻轻拂过她的手。

shifting

n. 移位，转移，偏移，狡猾；v. 改变(shift的现在分词)；adj. 移动的，多变的，狡诈的；
例句
...the shifting geopolitics of the post-cold-war era have changed the thinking behind aid.
冷战之后地缘政治的变幻改变了人们对援助背后的思考。

sand

n. 沙，沙滩，沙色；vt. 撒沙于，用砂纸磨光；
例句
... the mile of white sand beach bordered by palm trees and tropical flowers
四周种有棕榈树和热带花卉的长达1英里的白色沙滩
热门例句
He acknowledged publicly that he might have made a mistake.
他当众承认自己可能犯了个错误。
...the spiralling vortex airflow that slows the plane.
使飞机减速的螺旋形气流涡旋
You just go on ahead. I'll come by later...
你只管先往前走。我随后就来。
He who spares his rod hates his son, But he who loves him chastens him early.
24不忍用杖打儿子的,是恨恶他;疼爱儿子的, 趁早管教.
For further information, please contact 414 3925, extension 2253.
详情请致电414 3925,转分机2253。
He sat there while I made the case for his dismissal...
他坐在那儿，听我陈述解雇他的理由。
Baroness Thatcher's claims seem credible to many.
撒切尔女男爵的主张在很多人看来是可信的。
Nothing to be got without pains but poverty.
一份耕耘，一份收获。
This decree obliges unions to delay strikes.
该法令迫使工会推迟罢工。
The right to demand payment from the endorser of a commercial paper when the first party liable fails to pay.
追索权当有支付义务的第一方不能支付时，可以向商业票据的背书人要求支付的权力。
相关例句
They were standing neatly in a row.
他们整齐地站成一行。
A violent storm had struck the area.
一场猛烈的暴风雨席卷了该地区。
Hopes for an early cut in German interest rates lit the market's fuse early on.
对德国很快将会降低利率的期望使得市场早早启动了。
Have you taken all the variables into account in your calculations?
在你的计算中有没有把所有的可变因素都考虑进去?
The staff were somewhat alarmed by the man, who was in an excitable state.
那个情绪激动的男人让职员们感到有些恐慌。
Menhaden and its oil are used in animal feed and other products.
鲱鱼和它的鱼油用于动物饲料及其它产品.
The might of the army could prove a decisive factor.
军事力量可能会成为决定性的因素。
He bowed his thanks.
他鞠躬致谢。
The enemy encompassed the city.
敌人包围了城市.
Officials said they had found no traces of violence on the body of the politician.
官员称他们没有在这位政治家的尸体上发现暴力侵犯的痕迹。