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A third of Africa is under threat of desertification.是什么意思？

A third of Africa is under threat of desertification.

非洲有三分之一的土地面临荒漠化的威胁。

相关词汇
third of Africa is under threat desertification

third

n. 第三，三分之一，第三档；adj. 第三的，三分之一的；
例句
A third brigade is at sea, ready for an amphibious assault.
还有一个旅已在海上待命，准备两栖进攻。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；
例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

Africa

n. 非洲；adj. 非洲的；
例句
Armed only with a BBC microphone, I travelled across South Africa meeting writers.
仅仅凭借着一支英国广播公司的话筒，我走遍了南非，会见了许多作家。

is

vt.& vi. 是（be的三单形式；n. 存在；
例句
Bollinger 'RD' is a rare, highly prized wine.
博林格RD香槟是一种名贵的备受推崇的葡萄酒。

under

prep. 在…下面，在表面之下，在…的假定表面或掩饰下，少于，小于，在…情况下；adv. 在下面，少于，在水下，在昏迷中；adj. 较低的，下面的；
例句
...efforts to acquaint the public with their rights under the new law...
为使公众熟悉新法律所赋予的权利而作出的努力

threat

n. 威胁，恐吓，凶兆；
例句
The threat is likely to remain in abeyance until next year's meeting in Reykjavik.
这一威胁很可能会一直存在下去，直至明年的雷克雅未克会议。

desertification

n. 沙漠化，沙化；
例句
The desertification of land by the current world - wide attention.
留学解答资讯网:土地的沙漠化得到了当今世界广范围的重视.
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
...drugs which block the effects of heroin use and rapidly detoxify addicts...
能阻止海洛因在体内起作用并让吸毒成瘾者迅速脱瘾的药物
You know very well what I meant to say...
你非常清楚我想说什么。
He was too much of a maverick ever to hold high office.
他太特立独行，永远不可能做高官。
I vowed then, no matter what, I would never be like those people.
于是我发誓，无论如何，我和他们那种人都不会成为一丘之貉。
...a pub trivia game.
酒馆知识问答游戏
...the fear that a political deadlock may petrify economic initiatives.
对政治僵局可能会使经济发展停滞的担心
Whatever the scientists ultimately conclude, all of their data will immediately be disputed.
不管科学家们最后得出什么样的结论，他们的全部数据将会立即引起争议。
Little had altered in the village...
村子里几乎没有什么变化。
Knives will scratch the worktop.
小刀会在工作台上留下划痕。
He doesn't have mastery of the basic rules of grammar.
他还没有掌握基本的语法规则。