semi - arid area是什么意思 semi - arid area怎么读
semi - arid area的用法和样例
- Groundwater has very important eco-value in arid and semi-arid regions.
摘要干旱半干旱地区地下水具有重要的生态价值。 - Aeolian sand, distributed extensively around China?s arid and semi arid zones, is the main bearing body of wind erosion in China.
风成沙广泛分布于我国干旱与半干旱地区，是我国风蚀与风沙活动的主要载体。
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