水荒
water scarcity
例句：
Water scarcity had become more of a threat in arid regions, and about 700m people in 43 countries were facing water shortages.
水荒在干旱地區(qū)的威脅日益嚴(yán)重，全球43個(gè)國家約7億人面臨水源緊張問題。
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