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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；

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]；

Africa

n. 非洲；adj. 非洲的；

is

vt.& vi. 是（be的三单形式；n. 存在；

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；

threat

n. 威胁，恐吓，凶兆；

desertification

n. 沙漠化，沙化；
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